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View Full Version : what weight oil are you running??



freeline95
07-30-2009, 02:24 AM
I was wondering what weight oil everyone was running in summer time? It doesn't really matter what brand just wondering what weight. I'm trying to decide what weight to use and just wanted to see what every one else was using.

Knightwing
07-30-2009, 06:17 AM
20w50 Valvoline has been my choice in almost all my cars.

freeline95
07-30-2009, 10:00 PM
thanks for the reply. I also forgot to mention that this was for a 3.8 SC.

fturner
07-31-2009, 08:49 AM
I'm running 5W50 synthetic in my car.

Fraser

Kevin Leitem
07-31-2009, 04:26 PM
10w40 dino oil.

CMac89
07-31-2009, 11:05 PM
Royal Purple 11 Lite!

rickbtbird
08-01-2009, 07:41 AM
Royal Purple 5w30 synthetic has been a good performer for my mostly stock 3.8L SC

quicktsi
08-02-2009, 10:48 PM
Amsoil 0W-30

decipha
08-03-2009, 07:22 PM
20w50 Valvoline has been my choice in almost all my cars.



x2 from my lawnmower to my 3 sc's and soon to my turbo 408
full synthetic

i change the filter once and month and just top off what i lost

Jimmy 2Coupes
08-08-2009, 01:06 PM
10W30 Mobil 1 full synthetic in both SC's.

RedSC93
08-08-2009, 09:39 PM
I just realized I picked 40w :rolleyes: I use 5w30 Pennzoil

qc89SC
08-13-2009, 11:26 AM
i use castrol syntec 5w50

forcedbird94
06-26-2010, 02:09 PM
royal purple 5-30

mywhite89
06-28-2010, 02:47 PM
Mobile 1 full synthetic 10w30 in both SC's.

J dot Miller
06-28-2010, 06:35 PM
I use 10w40 Royal Purple in the summer. If I ever raced I would try 5w50.
:eek:

Crash00527
07-01-2010, 02:51 AM
i switch back an forth from RP & Mobil 1 5w30. but im gonna start using Amsoil come JAN.

Crash00527
07-14-2010, 11:21 PM
Why???.....

rjgraul
07-16-2010, 07:43 PM
AMSOIL 5W-20 Dominator Racing Oil.

S_Mazza
08-27-2010, 01:47 PM
People who know use Valvoline. :p

I usually use Valvoline 10W30 in the summer. No real reason. It just seems to be a good combination of price and quality. I have never owned a car since new, or even a fully rebuilt engine, so I haven't felt a strong need to go with a full synthetic. If I rebuild the entire engine, maybe I will switch over.

ThunderRoad
04-12-2012, 11:30 PM
I use 10w40 Royal Purple in the summer. If I ever raced I would try 5w50.
:eek: same thing

David Neibert
04-14-2012, 09:34 AM
I'm using 5w40 Valvoline full synthetic on the current 4.2 motor. In the past I was using 20w50 Valvoline race oil, but when tearing the motor down Dave Dalke found that the wrist pin bushings were pretty hammered, and thought it was probably from the oil being too thick. I've also added a mechanical oil pressure gauge under the hood to check pressure at cold start up and hot idle every once in a while.

David

Micahdogg
04-30-2012, 03:06 PM
15w50 Mobil 1 Synthetic in my 3.8.

90sc35thann
08-08-2012, 07:48 PM
I just rebuilt my engine 500 miles ago. I broke it in with 5w30 motorcraft semi synthetic. I want to change the oil this weekend to get out all of the prelube, etc. that goes with a new rebuild. I think I am going to start running full synthetic. Has anyone had any issues doing this on a fresh motor?

rjgraul
08-10-2012, 07:26 AM
I just rebuilt my engine 500 miles ago. I broke it in with 5w30 motorcraft semi synthetic. I want to change the oil this weekend to get out all of the prelube, etc. that goes with a new rebuild. I think I am going to start running full synthetic. Has anyone had any issues doing this on a fresh motor?

You will be fine with the full synthetic. Synthetics from the major oil companies which are petroleum base stock oils.

You would even be good with the AMSOIL Signature Series oil too.