Which motor oil are you using?

[Quik289]

Originally Posted by Keithc8

Hate to tell you but the Mobile is not near what it used to be. It has had to change to meet the requirements of the new cars as well. The heavier weight oils are a little better. You better not break in a flat tappet camshaft that has any spring pressure at all on this other stuff.
I am just telling people that there is a difference in the oil now and they have all changed in the last 10 years. All of the cup teams us to run the Mobile but when they changed it to meet the new requirements starting in about 2000 they all had to change due to new wear problems.
I am just telling you the best oil that you can run in your engine. It is the same old story, I have used such and such for 25 years and it is the best there is. Well these are different times and most all of the oils of the shelf are junk for your high end engine. These are just facts that I am passing along.

Good luck, Keith

Keith, Thanks for taking the time to tell us about real world experience and results with the new oil formulations which are light on ZDDP. Your advice is well taken (and wear observations interesting). Please don't forget to update the information in the excellent "Pedigree Packet" that comes with each of your engines. I recently took delivery of a SBF from you for my Cobra, and I believe the information you provided basically says to break it in on 10W-30 or 10W-40 mineral before considering a switch to synthetic, and nothing more. It makes me a little nervous to think that following that advice might not cover me as the oil I used was not Joe Gibbs (I used Rotella mineral spec'd for diesels to have enough break in additives). Admittedly the engine I bought will not see much, if any, track time, but I'm looking forward to checking those HP and torque curves that you provided with some real world driving once the weather clears.

Enjoyed the tour of your facility. Lots of interesting work going on there.