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View Full Version : Poll What Oil do you guys Run and what are your average OAT



Danzajax
08-24-2007, 05:09 PM
Im daily drving my SC temporarily while my VW Jetta is getting an enormous 1/4 Lag bolt removed from the tire. I noticed today, with the air on and sitting in traffic, my temps were a little high. Any my oil gauge (converted with a sending unit and jumper wire) would bounce down to 0 :eek::eek:

If i feathered the gas a little it would bounce back up to normal. :confused:
Its freaking hot here in SA (probably 90+ today) and I'm a Northern guy born and raised in Dearborn MI and Colleged in Houghton MI. I'm not used to this heat crap. The car never had oil problems before.

The Connector is on their tight and the engine didn't sound like it was low on oil pressure so it got me thinking. What Viscosity should I be running in this Heat? Oh, my Fan runs all the time (cut wire #14 or whatever it was).

What are you guys running? OAT = Outside Air Temperature.

-DZ

joshbea6
08-24-2007, 05:51 PM
Well we see temps here from 0-104(ish) (like this week with the heat index).

I stay with 5W-30 year round in the 4.6L Sport. The SC is still apart...

A1cntrler
08-24-2007, 09:37 PM
I'm a Northern guy born and raised in Dearborn MI and Colleged in Houghton MI.
-DZ

My dad went to MTU up there. I was born there and lived for a few years. Too young to remember it then, but I have been back several times to visit and love it. I haven't seen winter up that way, and everyone says I would change my mind if I ever did. Anyways I lived in Lansing and Jackson for awhile too before my family moved to VA in the early 80's. I still have some relatives in Mancelona (East of Traverse City) and in Jackson. Someday I will return to live in MI. Even my wife loves it up there.

Sorry to take it of topic. Just wanted to share :)

Danzajax
08-24-2007, 10:10 PM
I miss Houghton some days. You might be intimidated by the snow at first, but then you buy a 4x4 Explorer XLT with 235 75R16s and power through it like bull. :p The snow was alot of fun. I miss how clean and pristine it was up there.... lots of places to camp and explore. Sometimes the cabin fever would set in a little thick. San Antonio, by comparison, is dirty and full of litter. I think some day I'd like to go back.

-dz

fturner
08-24-2007, 10:19 PM
I run 10W30 Mobil 1 and even on the days where we are seeing 110F with the humidex and driving her hard, at idle I get about 18psi in gear holding about 600RPM. At about 800 RPM's she's already getting 40PSI and anything above 1300 RPM's I'm getting about 60PSI..... Thats with the car at about 200F running temp.

And thats a motor with about 120k miles on her. According to what I've read though, I guess thats really low and I'm gonna blow something up so I should be running Diesel oil.

Oh well.

Duffy Floyd
08-27-2007, 01:53 AM
I run 15-50 Mobil 1 in the summer and 10-40W Castrol Synthetic in the winter. I would run Mobil 1 then too but they don't seem to make that grade in Mobil 1.

David Neibert
08-27-2007, 11:48 AM
20w50 Valvoline Race and during the winter, 10w40 Valvoline syn blend.

David

franky_402
08-28-2007, 03:03 AM
10w30 mobil 1 with 95,000 havent had the car in the winter yet, but my plans are not to drive it then, too much salt!! Car ran hot untill i did a complete rad flush and now runs alot cooler

deepbluesc
08-30-2007, 06:09 PM
or Red line 15-50. Never seen snow, but was driven once in below 20 degree weather to get it to my new house.

Not really 'off-topic' but I had a piece of Catera for a while. My car is my office, so it runs 6 to 9 hours a day, gets started dozens of times a day, idles A LOT!! and spends more time in city driving conditions than anything else to the tune of about 5000 miles a month. Anyway, the Catera would drop oil pressure at ldle into the danger zone and turn the chime and warning light on after running for a while. I changed to 15-50 and it never happened again.

Jimmy 2Coupes
09-02-2007, 06:25 AM
Mobil 1 10W30 full synthetic year round in both of my SC's but as soon as the salt hit's the roads in winter they don't come out of the garage until a few good rains the following spring anyway. I drive the piss out of my SC's at times and no blown head gaskest's to date knock on wood. The 94 was purchased brand new in 94 with 12 miles on the odometer and the 95 was purchased in 97 with 32,000 miles on odometer. Maintenance is key, one example I do a COMPLETE coolant change every spring in both of my SC's. It's a ~~~~ but it sure can't hurt.:D

Jim Demmitt Jr
09-02-2007, 09:20 PM
I use Kendall 20w50 racing oil in my SC

We also use Kendall 50w racing oil in our 427 racing engines never had any oil issues

rzibilske77
09-03-2007, 06:56 PM
I run 15-50 Mobil 1 in the summer and 10-40W Castrol Synthetic in the winter. I would run Mobil 1 then too but they don't seem to make that grade in Mobil 1.

I use 10-40 syn blend yr round, I could swore mobil use to have this grade, but apparently not, so like Duffy i go with castrol. I did use to run a lighter oil, but with the climate here in southeast Texas i would get a drop in oil pressure that i was not comfortable with.

Super XR7
09-03-2007, 07:14 PM
I selected "other"; seems like I can't get past the break-in oils.:rolleyes:

Mike

Deep6
09-04-2007, 08:12 PM
5W-30 Mobil 1 year round. The 5W-30 is good for winter starts and will provide engine protection up to 100F. Since it rarely reaches those temps here (maybe 95 in a heat wave) I don't bother switching grades.

I did run 10W-30 Mobil 1 one time because the store ran out of 5W-30. When the weather turned cold, i was getting alot of Lifter ticking on start up. I changed the oil back to 5W-30 Mobil 1 when the store got more oil and the cold start lifter ticking went away.

Mobil 1 DOES make a 10W-40. It is in a gray bottle with a black label on it and says that it's recommended for European Car brands like BMW and Mercedes.

I also remember reading by Dr. Fred a long time ago that the best grade of oil to run on the street would be the one with the LEAST point spread between extremes. This is why alot of the newer cars are running 5W-20, because it increases fuel efficiency.

That being said, I'm thinking of switching to the new Mobil 1 high mileage to see if I notice any running difference (when and if I get the car back on the road).

rzibilske77
09-05-2007, 10:06 AM
mobil 1 does make the 10-40 grade.....just not in a syn blend

sccrewzer
11-11-2008, 02:34 AM
I tend to use Royal Purple on most of my cars 10w 30. I live So Cali its always hot here.:D

ScrapSC
01-11-2009, 04:27 PM
15w 50 Mobile 1 synthetic in both the SC's...

Mike8675309
01-11-2009, 04:32 PM
I've been running Shell Rotella T oil since I rebuilt the motor in the 93. The 90 is running mobil 1. I believe the Shell is a 15w40.

I was gonna go to a synthetic in the 93 last year, but a nagging oil leak kept me from wanting to waste the more expensive oil. Hope to clear up the oil leak this winter/spring, at which time I'll start running a racing synthetic.

Outside air temps run from morning lows down to 40F (spring/fall) to afternoon highs 90-100F (summer).

garsc
01-12-2009, 07:40 PM
I run Castrol Syntec 10w40 full synthetic,seems to hold up well in the Florida heat.

89tird
01-12-2009, 08:40 PM
Motorcraft syn blend 10W30 !! along with a motorcraft filter!!

best price ever too, outside 80-95 degrees

MikeKanterakis
03-11-2009, 05:48 PM
I live in Southern California, so the weather isn't really ever all THAT cold. However, it does snow up in Big Bear where I ski, so the car does see some actual cold weather, sometimes.

I run the "Mobil 1" 0W-30 oil. I picked up 1 mpg by making the switch from 5W-30. I use the Ford Oil filter. Both are available at your local WalMart.

Both T-birds (Manual and Auto) are rebuilt 99% stock. I say 99% because with that many miles, there's always something thats just NOT perfect. So, basically, the engine sees normal boost preasures. And the ring seal is probably as good as it gets. I probably now almost have about 60,000 miles on the daily driver's rebuilt motor.

On my daily driver I got 10,000 miles on one oil-change. Yep! 10,000 miles. It got to the bottom of the cross-hatched area on the dip-stick after the last 200 miles. I took the car up the mountain to Big Bear for a ski trip. The oil was dark, but not like ink. When I'd wipe the dip-stick on a paper towel, it would look like a deep honey color with some noticible soot staining the paper.

I'm happy with the results, and on a car that does mostly freeway driving (averageing 85 mph), it's nice to not have to a.) spend money on oil changes ever month and b.) not have to change oil every month either.

ThunderRoad
03-11-2009, 07:59 PM
I've been running Shell Rotella T oil since I rebuilt the motor in the 93. The 90 is running mobil 1. I believe the Shell is a 15w40.

I was gonna go to a synthetic in the 93 last year, but a nagging oil leak kept me from wanting to waste the more expensive oil. Hope to clear up the oil leak this winter/spring, at which time I'll start running a racing synthetic.

Outside air temps run from morning lows down to 40F (spring/fall) to afternoon highs 90-100F (summer).
AS THE HOT RODS MAGINZES WERE SAYING :)THAT THE EPA HAS MADE THE OIL COMPANIES REMOVE THE ZINC & PHOUFUS OUT:mad: ON THE DOWN SIDE IT CAN DESTORY THE CATS FAST WITH BUILDUP :o BUT WHICH DO YOU WANT A MOTOR OR CATS :confused:

Kicker
06-06-2009, 05:26 PM
I like the ELF (By Total oil) 5 W40. in the summer, and well she sleeps all winter.

Crash00527
06-21-2011, 09:34 AM
AMSOIL 5w30 all the way baby.

rjgraul
06-21-2011, 05:44 PM
AMSOIL RD30 10W-30 but will change to the RD20 5W-20 next oil change. This is AMSOIL's Racing oil which they have in three different viscosity 5W-20, 10W- 30 and 15W-50

decipha
02-17-2013, 12:52 AM
I sometimes do inspections at a local oil bottling facility here in new orleans

i know first hand 95% of different brand oils come out the same exact tank

so when u say "x" brand its really not any different than most others

in any case API regulates the oil specifications so much there isnt much of a difference anyway

the best oil to get is synthetic and if u can find "off road" zinc oil your engine and bearings greately appreciate it

I only use 20w50 full synthetic in everything

rjgraul
02-17-2013, 03:52 PM
I sometimes do inspections at a local oil bottling facility here in new orleans

i know first hand 95% of different brand oils come out the same exact tank

so when u say "x" brand its really not any different than most others

in any case API regulates the oil specifications so much there isnt much of a difference anyway

the best oil to get is synthetic and if u can find "off road" zinc oil your engine and bearings greately appreciate it

I only use 20w50 full synthetic in everything

Why do you only use a 20W-50? Use the proper viscosity oil that the manufacture recommends for that engine.

There are very few engines built since the late 1980's that need a 20W-50 oil. Using too thick of an oil in modern engines cause higher operating temperatures even when using a synthetic oil. It can affect MPGs and horse power due to the tight tolerances of modern engines and trying to push that thicker oil through those tighter spaces in the engine.

Most full synthetic oils from the major oil companies are actually a group 3 base stocks which is petroleum. High end synthetic oils are group 4 base stock and are man made not refined like the group 3.

If you are worried about the lighter viscosity oils breaking down then you are using the wrong oil, synthetic or petroleum. I use a 5W-20 group 4 100% synthetic oil in my 94 SC and my new Mustang. Shoot, I even us a 5W-30 synthetic in my 2006 Dodge Turbo Diesel.

Thicker oils like 20W-50 are for engines from the 50's, 60's and even the 70's.

ThunderRoad
02-17-2013, 04:16 PM
IN THE MANY TEARDOWNS THAT HAVE BEEN DONE:eek: THE BOTTEM END SHOWS MORE THE WEAR ON THE MAIN BEARINGS THAT THE REST OF THE MOTOR :( IN THE EARLY USE OF LIGHT OIL IT,S OK BUT AS TIME GOES ON IT DOSEN,T PROTECT THE MOTOR:p LIGHT OIL IS TO KEEP MILEAGE UP :cool: BUT THE MOTOR WILL SUFFER :(

rjgraul
02-18-2013, 02:21 PM
IN THE MANY TEARDOWNS THAT HAVE BEEN DONE:eek: THE BOTTEM END SHOWS MORE THE WEAR ON THE MAIN BEARINGS THAT THE REST OF THE MOTOR :( IN THE EARLY USE OF LIGHT OIL IT,S OK BUT AS TIME GOES ON IT DOSEN,T PROTECT THE MOTOR:p LIGHT OIL IS TO KEEP MILEAGE UP :cool: BUT THE MOTOR WILL SUFFER :(

Then you need to use AMSOIL Signature Series Oil that has a higher film strength than what you are using. ;-) Thicker oil is not the answer for every engine.

ThunderRoad
02-19-2013, 06:51 AM
OLDER WORN MOTORS WILL NOT LAST :eek:WITH LIGHT OIL OVER TIME :rolleyes:WHY DO YOU THINK THAT THEY MAKE " HIGH MILAGE OIL " ???:)

Crash00527
02-19-2013, 09:48 AM
I have 158k on my engine. But I take very good care of my car and never beat on it. At what point and condition should I use thicker lol.

rjgraul
02-19-2013, 12:22 PM
I have 158k on my engine. But I take very good care of my car and never beat on it. At what point and condition should I use thicker lol.

Manny keep using The AMSOIL you are using. You are using the best oil on the market bar none.

rjgraul
02-19-2013, 12:34 PM
OLDER WORN MOTORS WILL NOT LAST :eek:WITH LIGHT OIL OVER TIME :rolleyes:WHY DO YOU THINK THAT THEY MAKE " HIGH MILAGE OIL " ???:)

Because it is "marketing" to sell more oil.

It is a bold statement to say that "high mileage engines" should not use a lighter viscosity oil because that is just flat not true. It all depends on the quality of the oil and the type and brand of oil that has been used in the engine.


AMSOIL does not sell a "high mileage oil" because of the higher quality of products they make. :D

ThunderRoad
02-19-2013, 12:40 PM
1 WHAT ISTHE OUTSIDE TEMP:confused: U DON,T WANT 2 RUN 2 HEAVY IN WINTER:rolleyes: 2 WHAT IS THE PRESSURE AT IDLE AFTER WARM UP :p 3 WHAT IS THE PRESSURE AT 2000 RPM AFTER WARMUP:D 1 MORE WHAT IS ENGINE TEMP AT HOT DAYS IN SUMMER ??? :o ALL THAT IS TO HELP U MAKE CHOICE IN WINTER RUN 10-30 0R 15-40 SUMMER 15-40 WITH SOME LUCAS THICHER ;) VERY HOT 20-50 :eek: BTW MY 95 4/6 WAS UNDER 100000 MILAGE USING 5-30 FROM FIRST OWNER :( USED A QUART A MONTH OR EVERY 500 MILES :mad:USED 15-40 NOW MAY ADD AFTER 9 MONTHS OR EVERY 4000 MILES ALSO KEEPS VAVLE GUIDES FROM WEARING DOWN ....ALSO IN MY SC,S I RUN ROYAL PURPLE 15-40 :) ALL MOTORS HAVE OVER 100000 2 200000 + :) I ALSO RUN EXTENTED MILES 7000 :cool: BE 4 CHANGES :D MOBILE 1 HAS 15000 MILEAGE OIL :( AND OTHER LIE WAS TO CHANGE OIL AT 3000 MILES:mad: AS NEWER MOTORS RUN CLEANER U DON,T NEED TO CHANGE AS OFTEN:) MY NEW CAR SAYS EVERY 7500 2 CHANGE:eek:

ThunderRoad
02-19-2013, 12:47 PM
Because it is "marketing" to sell more oil.

It is a bold statement to say that "high mileage engines" should not use a lighter viscosity oil because that is just flat not true. It all depends on the quality of the oil and the type and brand of oil that has been used in the engine.


AMSOIL does not sell a "high mileage oil" because of the higher quality of products they make. :D

SORRY U HAVE BEEN FOOLED :confused: BTW MY BUDDY WHO USED 2 SELL AMSOIL BLEW HIS MOTOR WITH JUST OVER 10000O MILES:mad: HE NOT LONGER SELLS IT:( WAS CHEVY PASSENGER VAN NEVER BEAT :( BTW DID U KNOW THAT NASCAR MOTORS RUN LIGHT WT OIL TO GET HIGHER SPEEDS FOR POLE POSITION THEN CHANGE TO THE RIGHT WT FOR RACE !!!!

Crash00527
02-19-2013, 02:22 PM
I've used Mobil 1 since in started driving. Than started with amsoil back in 2010. My camaro had an oil leak that i didn't even notice. Engine ran with NO oil for God knows how long and it ran like a champ. It was EMPTY one day when I checked dipstick than pulled oil plug.

Crash00527
02-19-2013, 02:22 PM
Manny keep using The AMSOIL you are using. You are using the best oil on the market bar none.

I wasn't questioning the brand just the viscosity.

Rick_Leuce
02-19-2013, 09:15 PM
Hey

I just changed the oil in my SC but the "Change Oil" light in my dash is still lit.

Do I need to reset something or is there a sensor thats bad?

rjgraul
02-19-2013, 09:37 PM
I wasn't questioning the brand just the viscosity.

Stay with the viscosity that you are using. If you are not using a lot of oil there is no reason to change.

rjgraul
02-19-2013, 09:48 PM
SORRY U HAVE BEEN FOOLED :confused: BTW MY BUDDY WHO USED 2 SELL AMSOIL BLEW HIS MOTOR WITH JUST OVER 10000O MILES:mad: HE NOT LONGER SELLS IT:( WAS CHEVY PASSENGER VAN NEVER BEAT :( BTW DID U KNOW THAT NASCAR MOTORS RUN LIGHT WT OIL TO GET HIGHER SPEEDS FOR POLE POSITION THEN CHANGE TO THE RIGHT WT FOR RACE !!!!

Was it proven that the oil blew the engine? Most likely not. The engine may have blown due to other issues which is what usually happenes. People almost always think it is the oil's fault that the engine blew because the last thing they did was change the oil or went to a different brand oil.

Most of the time when an engine blows it is usually due to oil starvation, pump broke and or oil not circulating or part failures. I read a report some where that said and engine failure has never happened due the engine oil itself, it has always been something else. Not knowing the whole story about his failure and weather or not the oil was analyzed to see if the oil was still good or not at the time of the failure and weather or not the oil was used per AMSOIL's directions. I can only speculate why it blew. It could have been possible the engine had high mileage when he converted it to AMSOIL and the damage had already been there, this has happen before too. Everyone wants to blame the oil.

I have used AMSOIL for over 30 years and have never had any engine failure and have put over 200,000 miles on one vehicle that used nothing but AMSOIL. So your friend's decision to stop using and selling AMSOIL was most likely not made on a sound reason. I guess he would have stop using Castrol if that was the oil he had been using too Huh.

And by the way did you that a lot of Nascar teams use AMSOIL and yes they use a lighter oil to qualify (a 0W-20 or 5W-20 or lighter) and then use a 20W-50 racing oil to race for up to 500 miles and then the engine is torn down for analysis. But those are Race Engines not a passenger vehicle engine.

It would also be nice if you would not type with just capital letters. That is considered yelling and is hard to read. Just saying ;)

rjgraul
02-19-2013, 09:49 PM
Hey

I just changed the oil in my SC but the "Change Oil" light in my dash is still lit.

Do I need to reset something or is there a sensor thats bad?

What year SC do you have? I have never seen an oil change light on my 94.

Crash00527
02-20-2013, 04:50 AM
Yea. I just gonna say the same thing. Do you have the new body style tbird?

ThunderRoad
02-20-2013, 05:02 PM
Was it proven that the oil blew the engine? Most likely not. The engine may have blown due to other issues which is what usually happenes. People almost always think it is the oil's fault that the engine blew because the last thing they did was change the oil or went to a different brand oil.

Most of the time when an engine blows it is usually due to oil starvation, pump broke and or oil not circulating or part failures. I read a report some where that said and engine failure has never happened due the engine oil itself, it has always been something else. Not knowing the whole story about his failure and weather or not the oil was analyzed to see if the oil was still good or not at the time of the failure and weather or not the oil was used per AMSOIL's directions. I can only speculate why it blew. It could have been possible the engine had high mileage when he converted it to AMSOIL and the damage had already been there, this has happen before too. Everyone wants to blame the oil.

I have used AMSOIL for over 30 years and have never had any engine failure and have put over 200,000 miles on one vehicle that used nothing but AMSOIL. So your friend's decision to stop using and selling AMSOIL was most likely not made on a sound reason. I guess he would have stop using Castrol if that was the oil he had been using too Huh.

And by the way did you that a lot of Nascar teams use AMSOIL and yes they use a lighter oil to qualify (a 0W-20 or 5W-20 or lighter) and then use a 20W-50 racing oil to race for up to 500 miles and then the engine is torn down for analysis. But those are Race Engines not a passenger vehicle engine.

It would also be nice if you would not type with just capital letters. That is considered yelling and is hard to read. Just saying ;)
U CAN USE WHAT YOU WANT:) ...BUT THERE ARE MANY OTHER " GOOD " :eek: OILS AS WELL !!!

Crash00527
02-20-2013, 05:50 PM
I don't know about, but I only like using the best not just good. Just my $ .02 :eek:

rjgraul
02-20-2013, 06:02 PM
U CAN USE WHAT YOU WANT:) ...BUT THERE ARE MANY OTHER " GOOD " :eek: OILS AS WELL !!!

You are correct. There are many good oils on the market but private lab tests have proven that there are better oils made a little oil company in Superior WI than what the major oil companies produce and if it were not true that little oil co. would not be in business 40 years later.

I had another thought if in fact the AMSOIL product that was in your friend's vehicle actually caused the failure it would have happen in a lot of vehicles and actually that would hold true with any brand of oil.

Also I am not trying to convince you to use AMSOIL.
I gave that up a long time ago I just state the facts and it is up to that person to decide what they want to use.

Have a Great Day :)