Shell/Rotella. It has the detergents/additives our flat tappet valve train NEED. It's also cheap.
I've never liked castrol. Not because it's a bad oil, but because I've noticed it turns the insides of motors a ugly, dark color.
Penzoil does tend to gunk up, but so will any other oil when you go a few thousand miles without changing or a few months without running the car.
I hate anything from Mobil, especially the sythetics. It's over priced and does poorly in the bearing pressure tests.
I've never liked castrol. Not because it's a bad oil, but because I've noticed it turns the insides of motors a ugly, dark color.
Penzoil does tend to gunk up, but so will any other oil when you go a few thousand miles without changing or a few months without running the car.
I hate anything from Mobil, especially the sythetics. It's over priced and does poorly in the bearing pressure tests.
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