Originally Posted By: Sam2000
Originally Posted By: Cooper
Pennzoil will continue to make a great product. They can't afford not to. The fear mongering without any proof in the thread is ridiculous.
So, volatility is a little higher? You think volatility is everything? They are now on par with just about every other oil in one aspect of the formulation. It is the total package and most of you should know that, otherwise you wouldn't be here......
Agree. The strictest NOACK I know of is 10% by Mercedes. There are Euro applications that have 2 year drain intervals so this is where it comes into play.
I read that GL6 will have a max of 13%. So why the concern that it's no longer 6% when its way better than required?
No, if they lowered the NOACK to 13% with GF-6, they would no longer be able to sell conventional oil (Groups II and I), as 13% is not possible with Group II. GF-6 NOACK will be the same as GF-5, which is 15%.
http://www.infineuminsight.com/insight/june-2012/specification-update-june-2012
Pennzoil Ultra 0W-40 has a NOACK of 13%, which is very high for it to be considered a top-quality synthetic. It fails many of the European specs, which require NOACK as little as 10%. NOACK is the primary indicator of base-oil quality; so, the quality of Pennzoil synthetic has gone down significantly. It's no longer a premium synthetic. You may be better of with Super Tech synthetic.
Questions to ask: (1) Why is NOACK so large for a GTL base oil? (2) How is the oxidation of the new Pennzoil synthetic?
When you guys do UOAs with the new Pennzoil synthetic, get the TAN as well as the TBN so that we could have an idea of the oxidation.