Hello,
This is my first post here. I've always used diesel oil (mostly Rotella) in my muscle cars for the higher zinc and phosphorous content. Never had any problem break-in a camshaft. My 69 Firebird 400 was rebuilt 11 years ago, it has 13500miles and the valvetrain does not show any sign of premature wear. I understand that most oil companies have oil formulas for older flat-tappet engines, but I live in a rural area and dont have many choices except regular brand oils and grades.
That being said, I found a few gallons of Gulf Supreme Duty XLE, 10W30, rated CJ-4/SM, dated 2014 at my local NAPA store. I was wondering if anybody knows something about that oil? I cant find any VOA on it, I've sent an email to Gulf, but dont expect any replies from them.
They are almost giving it away at 17$ a gallon.
Any info would be greatly appreciated.
Thanks!
This is my first post here. I've always used diesel oil (mostly Rotella) in my muscle cars for the higher zinc and phosphorous content. Never had any problem break-in a camshaft. My 69 Firebird 400 was rebuilt 11 years ago, it has 13500miles and the valvetrain does not show any sign of premature wear. I understand that most oil companies have oil formulas for older flat-tappet engines, but I live in a rural area and dont have many choices except regular brand oils and grades.
That being said, I found a few gallons of Gulf Supreme Duty XLE, 10W30, rated CJ-4/SM, dated 2014 at my local NAPA store. I was wondering if anybody knows something about that oil? I cant find any VOA on it, I've sent an email to Gulf, but dont expect any replies from them.
They are almost giving it away at 17$ a gallon.
Any info would be greatly appreciated.
Thanks!