Which motor oil are you using?

[AL427SBF]

Originally Posted by AL427SBF

Check out the Mobil 1 Racing Oils (page 2 bottom), if I'm not mistaken those 2 have the highest ZDDP content of any oils discussed so far? If so, and the ZDDP ppm count is the sum total of this debate - I would say the discussion is over (unless you decide to mix you're own).

More research, Joe Gibbs XP1 ZDDP 5846 ppm, some others even higher, WINNER Joe Gibbs!

[zrayr]

Originally Posted by AL427SBF

More research, Joe Gibbs XP1 ZDDP 5846 ppm, some others even higher, WINNER Joe Gibbs!

once the level gets that high it really only belong in a full on race only engine.
high zinc levels can damage metal. Race engines are disassembled & inspected frequently. Street engines, uhhh, not so much.

Z.

[Bxx1]

The following information was found on the Mobil 1 website:

Question:
Does Mobil 1 Contain the Additive for Flat Tappet Cams?
I build a few engines a year as I do muscle car repairs and I have been having a lot of camshaft failures. I just read that it is because the oil no longer has the additive for flat tappet cams. Can I use Mobil 1 to break in fresh rebuilt engines of '60s and '70s tech? Is it too slippery for new ring break-in? Will it give protection on new cam and lifters?

Answer:
For older, flat tappet engines where wear may be more of a concern, we offer a number of oil products which are higher in phosphorus than API SM/ILSAC GF-4 oils. These include Mobil 1 15W-50 (1,200 ppm), Mobil 1 0W-40 (1,000 ppm) and Mobil 1 High Mileage 5W-30, 10W-30 and 10W-40 (900 ppm). For all newer engines and flat tappet engines in normal service, API SM/ISLAC GF-4 oils are preferred for better fuel economy and for the protection of catalytic systems with lower phosphorous (800 ppm