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Old 03-13-2007, 10:53 PM
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POS POS is offline
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Join Date: May 2004
Location: Houston, Texas
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Yes and no. First, QS and Penn are not garbage - open your mind a bit. All oils must meet the standards set by the API, and those standards are high. All oils you're considering meet that standard, however, all those oils use additives to make their oil "better" than their competitors. Yes, they all reach the same standards so they are the same, but no their not the same because they all use different additives.

Pennzoil, QS, Shell, Chevron, etc. all make a good product. You could run it and you wouldn't notice a difference immediately or after 100k miles. The biggest leap in quality is from regular oil to synthetic. I use synthetic in everything I own except my diesels. For those, I use Chevron Delo 15-40.
- Brian

1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600
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