[patrickt]

Originally Posted by Rick Parker

patrickt:

Good article here:http://www.circletrack.com/enginetec...nts/index.html

By the way EOS is again available at GM dealers, the formula may not be the same thoiugh (???)

Good article, thanks. The new GM EOS still has quite the ZDDP, but the detergents have changed. I fear the new formulation is more directly targeted at engine break-in rather than extending the life, and zinc/phosphorous content, of your oil. I bought a case of EOS back before the switch so I'm still using the old stuff that did not have detergent levels this high; I should add that caveat to my posts recommending EOS. Of course, having too high of a detergent level defeats the purpose of the additives. I know in my archives I have a copy of the analysis of the old EOS, so after I wake up, have another two cups of coffee, and walk the dog, I'll see if I can find it and then edit this post to include it. Here's the analysis of the new stuff. Note the calcium level: