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What's the Best Oil Recommendation for a 2008 Envoy Denali?!?

Source: Yahoo! Answers

I know the Oil Cap says 5W-30. And I'd Probably use 10W-30. But That's not All what I'm talking about. What about Synthetic Oil?!? I know it Costs alot more, and I was wondering if that's a Smart Move over Conventional Oil. And What about Synthetic Blends, like Mobile... Read More

  • synthetic blends are like skim milk. they look like milk but taste like water. if you want the real thing, get the real thing. that being said, a true synthetic oil would be helpful. it will give you better protection at both temperature extremes you mention and continue to protect your motor down to the temperatures... Read More
  • using 10w30 is fine. it's still 30weight when hot. switching to synthetic is a smart move, aside from the extra cost, it's benefits outweigh the expense. make sure you have over 15kmiles first. blended oils are a gimmick to me. let's say you have an engine that takes 5 quarts of oil. put 4quarts of regular and 1 of... Read More

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