tbirdaj
Registered User
Anyone ever use this stuff? It is supposed to have more Zinc and phosphorous in it.
http://www.joegibbsracingoil.com/
http://www.joegibbsracingoil.com/
HAS IT AS IT IS MADE FOR HD WEAR ROTELLA BY SHELL IS GOOD ALSO INFACT AS OF 2007 MOST OILS WILL HAVE IT REMOVED MEANING RAPID WEAR ON FLAT TAPPETS CAMS MOST HOT ROD MAGS HAVE BEEN WARNING MOTORHEADS ABOUT THIS IF THE OIL HAS SUNBURST ON THE FRONT LABEL IT IS NG ABOUT THE SIZE OF A QUARTER BEWARE USE INTERNET TO FIND OUT MOREAnyone ever use this stuff? It is supposed to have more Zinc and phosphorous in it.
http://www.joegibbsracingoil.com/
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).