Quote:
Originally Posted by danc30
Keith Craft said to use regular 10w-40. That's what I use. Castrol 10w-40.
I go by what the engine builder suggests......
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Craft has changed his tune on this. He now recommends Joe Gibbs.
Quote:
Originally Posted by Keithc8
We have used about every oil possible. We will only warranty our engines if Joe Gibbs is used. If you look at the facts it has more ppm zinc and less ppm detergent than most any other oil. Try to stay away from most all oil that you can buy through a regular parts store. Those oils have to meet the lasted epa standards which have taken most all zinc out and added lots of detergents. As you well know zinc is what bonds the oil to the metal and the high ppm detergents wash the zinc away. This works great for late model stock engines with overhead cams and low spring pressure. Bottom line, make sure there is plenty zinc in the oil to save problems in the future. |