ANy thoughts on new oil?

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Apr 6, 2004
Midland, MI
Okay, my warranty is up on my 2002 Buick Century (3.1 only available engine) and I will now be changing my own oil instead of taking it in for service. I t has had Pennzoil the past 36,000 miles and I have no complaints. Basically I am thinking of either sticking with the Pennzoil or buying Chevron Supreme from my local TSC. Although retail priced the Chevron is generally cheaper, it is easy to find Pennzoil on sale at enough places that the cost difference is nill. Any opinions on one oil vs. the other, I really don't think I can go wrong with either. Any thoughts would be appreciated. Thanks!
Both Chevron Supreme & Pennzoil are good group II dino oils and are very popular on this board. Some have objections to the higher price of Pennzoil, but we're talking about the $ equivalent of a candy bar per oil change.
Pick either one. Run 4,000 miles, drain, refill, repeat. Use 10w-30 for three seasons and 5w-30 for winter. P.S. - Considering you own a 3.1L GM engine, do a UOA to find out what's going on...
I'd pick the Chevron, only because you are lucky enough to find their conventionanl oil locally. And its reasonably priced. Both are great oils though.
Since you have a 2002 GM car, chances are it's calling for a 5W-30 engine oil. TSC is about the only place left to find 5-30 Chevron Supreme, but supplies seem to be drying up around here. I think you can safely substitute Havoline 5W-30 and get oil that is (nearly?) identical to the Chevron Supreme. I will say however that either of your choices would be just fine.
I just went out and bout some Supreme 10w-30 for my next summer oil change. I figure with the money I am saving an oil change, maybe it will help pay towards a UOA.
Originally posted by Jelly: P.S. - Considering you own a 3.1L GM engine, do a UOA to find out what's going on...
Took the words right out of my mouth Jelly. There is at least a 50% chance of having a coolant leak at 50K miles and 100% of it having one by 100K miles. You must do an oil analysis. And since Potassium is usually the culprit-I strongly recommend Blackstone.
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