Joe Gibbs racing oil

That's a great site for anyone wishing to learn some good info about motor oil. Just remember that 'racing' oil is not necessarily always the best choice for a mostly street-driven car.
 
Most 15-40 Wt Oil

Anyone ever use this stuff? It is supposed to have more Zinc and phosphorous in it.
http://www.joegibbsracingoil.com/
HAS IT AS IT IS MADE FOR HD WEAR:cool: ROTELLA BY SHELL IS GOOD :mad: ALSO INFACT AS OF 2007 MOST OILS WILL HAVE IT REMOVED :( MEANING RAPID WEAR ON FLAT TAPPETS CAMS :D MOST HOT ROD MAGS HAVE BEEN WARNING MOTORHEADS ABOUT THIS :) IF THE OIL HAS SUNBURST ON THE FRONT LABEL IT IS NG :eek: ABOUT THE SIZE OF A QUARTER :confused: BEWARE:( USE INTERNET TO FIND OUT MORE :D
 
Not exactly: The GF-4 spec oil came on line for 2005 and newer model gasoline-powered passenger cars and trucks. It is the first international(ILSAC) graded oil specified for US vehicles.
The GF-4(also rated as SAE 'SM') has 30% less ZDDP (zincdiakyldithiophosphate) than the 'SL' oil that was used before 2005. This new oil was specifically formulated with the new 150,000 mile catalytic converter life in mind, since that is what is mandatory by the gov. since 2005.
The previous spec was for 50,000 miles federal (70,000 Cal & H.A.). The ZDDP tends to contaminate the cats after about 70,000 miles or so rendering them inneffective.
The only was to meet the new 150K spec was to drastically lower the ZDDP content, which they did.
Forr 2009, GF-5 is slated to be on board with another 20% reduction, but that will probably be held back at least a couple years or so.
The zinc compounds are indeed valvetrain EP lubricants, and the lesser amount in newer GF-4 oil shows excess wear and tear on older flat-tappet cams and lifters, but on modern low-tension stock engines there is no cause for alarm. And roller cams are in no way negatively affected.
If you have an older hi-po engine, use the Rotella 'T', which has a LOT of ZDDP, as well as a much more robust detergent package...so much in fact that there is some concern for spark plug deposits. If you change your plugs every 20,000 or so there should be no problem, but don't go much beyond that using Rotella 'T' or any other diesel rated oil (CF).
 
It Also Stops

Not exactly: The GF-4 spec oil came on line for 2005 and newer model gasoline-powered passenger cars and trucks. It is the first international(ILSAC) graded oil specified for US vehicles.
The GF-4(also rated as SAE 'SM') has 30% less ZDDP (zincdiakyldithiophosphate) than the 'SL' oil that was used before 2005. This new oil was specifically formulated with the new 150,000 mile catalytic converter life in mind, since that is what is mandatory by the gov. since 2005.
The previous spec was for 50,000 miles federal (70,000 Cal & H.A.). The ZDDP tends to contaminate the cats after about 70,000 miles or so rendering them inneffective.
The only was to meet the new 150K spec was to drastically lower the ZDDP content, which they did.
Forr 2009, GF-5 is slated to be on board with another 20% reduction, but that will probably be held back at least a couple years or so.
The zinc compounds are indeed valvetrain EP lubricants, and the lesser amount in newer GF-4 oil shows excess wear and tear on older flat-tappet cams and lifters, but on modern low-tension stock engines there is no cause for alarm. And roller cams are in no way negatively affected.
If you have an older hi-po engine, use the Rotella 'T', which has a LOT of ZDDP, as well as a much more robust detergent package...so much in fact that there is some concern for spark plug deposits. If you change your plugs every 20,000 or so there should be no problem, but don't go much beyond that using Rotella 'T' or any other diesel rated oil (CF).
:D
RUST AS THE LATEST TECH POSTING SHOWN IN THE NEW HOT ROD MAG AS WELL :)
 
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I just talked to a Harland Sharp rep and he was talking about the same subject. I sent my rockers back because the roller was eating into the body of the rocker. He said the lack of zinc in the oil was a contributing cause and they have been seeing more and more issues.

Im thinking about going with Brad Penn "the green oil". It still has the zinc additive.
 
As mentioned above, ANY oil with the 'gasoline starburst' on the front label, and a GF-4/SM rating in the API donut on the back label has the reduced amount of zinc additives. It doesn't matter what brand it is or what the advertising says...guv regs require the lower levels or it can't be certified.
For a higher ZDDP content, use either a diesel-rated oil, or a 'racing' oil. Just try to stay away from the heavy viscosities unless really necessary.
 
I have to wonder about the future of the oils for diesels as more are starting to come with cats from the factory so shouldn't the manufacturers be worried about deposits on the cats?
 
Absolutely! Those oils are changing soon too. Most oil marketers are or will be selling 'racing' oils (or some other such marketing term) for our older cars. It just won't be rated for use in newer cars, that's all.
 
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