Here is some serious reading so be patient. This is one of the very few testing surveys that are not biased or funded by a manufacture. Dont be mad when you see the results of your favorite oil.
I pretty much read the same thing. The Pennzoil 5w30 Ultra for our application is the best you can buy even without the Prolonged Engine Treatment. Good read, thanksWow great read everyone should read this article...I read most but not the whole thing but very eye opening...high zink oils are NOT the answer at all and it was surprizing that a good
full synthetic oil and good conventional oil is pretty much on par with each other as for as high temp wear goes.....looks to me like the Pennzoil 5w30 Ultra with the Prolonged Eng Treatment
is the top dog and the 5w30 Castrol GTX with the PET added is right up there with it.....great read thanks for posting this Cales.