Which motor oil are you using?

[zrayr]

Originally Posted by Bob In Ct

".................. If you want to know the ZDDP level in the oil you're using just give the company a call.

Bob

zinc & phosphorous levels for all Mobil 1 oil products:

http://www.mobiloil.com/USA-English/...duct_Guide.pdf

Originally Posted by CobraEd

"..............Most engines can still run fine with it though for hundreds of thousands of miles. That point does not speak to the levels of ZDDP for the average engine.

I was not referring to an average engine, but a vintage 289 flat tappet mechanical cam engine. The kind most vulnerable to an insufficient amount of zddp. Therefore the lack of measurable wear is an indication that sufficient lubrication is present. Not fact, or proof, but definitely an indication.

Z

[undy]

After seeing the 1300 PPM of Zinc in the M1 15w/50 I think I'll keep it in the crank case for a bit longer. I hate to waste 10 quarts of oil anyway... I still ordered 10 quarts of the Joe Gibbs 15/50 HR oil for the next oil change though. After that, due to Joe Gibb's exorbitant pricing, I'll return to Mobil 1's 15/50.

[AL427SBF]

Originally Posted by zrayr

zinc & phosphorous levels for all Mobil 1 oil products:

http://www.mobiloil.com/USA-English/...duct_Guide.pdf

I was not referring to an average engine, but a vintage 289 flat tappet mechanical cam engine. The kind most vulnerable to an insufficient amount of zddp. Therefore the lack of measurable wear is an indication that sufficient lubrication is present. Not fact, or proof, but definitely an indication.

Z

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).

[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.