Which oil do you use

[Hib Halverson]

Originally Posted by Paul Workman

For what it's worth...a comparison.

Considering the speed, and length of the cam chains, durability, size of the cam sprokets, etc, I don't think ZDDP is a "moot" consideration for the LT5 simply because of the lesser spring tensions. You decide....

Ok. I'll bite, but educate me by answering this question, then I can decide.

How is an extreme pressure additive (ZDDP) intended to lubricate parts under high pressure and which "slide" or "rub" across each other a necessity for the durability of a rollerized cam chain?

Also, someone mentioned above that they buy a ZDDP additive and put it in the oil. If you feel urge to add more ZDDP in that manner, be very careful with that. Measure the amount of that stuff accurately such that your PPM phosphorous doesn't get much over 1400-1600 because, a lot of ZDDP in the oil over a long period actually can cause "chemical wear" of the cam lobes.

Also, high levels of ZDDP in the oil can shorten catylitic converter life, too.

Keep in mind that the folks who market that stuff will gladly sell you as much as you want, but they're not going to buy you new cams or new cats if you use too much of it.