Originally Posted By: pavelow
I tried Pennzoil Platinum 5w30 in the Jetta last year after reading rave reviews about it here. Well, after dealing with a noticeably noisier engine for a week, especially at higher rpms, I drained it out. That could have been from the thinner 30wt in an engine with a valvetrain engineered for 40wt, but either way, I drained it and refilled with my old standby(and what was used exclusively prior to the Pennzoil Platinum experiment).....Shell Rotella Syn 5W40. All the valvetrain noise went away and I vowed to never switch oils again.
I think you can switch oils if you want to, but you should just use one that's spec'd for your engine. PP is fine oil, but it doesn't meet the 503.00 or A3 spec for HT/HS. There's nothing wrong with the oil, it's simply the wrong oil for your application.