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Re: Engine Oil - What is "extremely hot"?
Posted by McMike (more from McMike) on Fri, 23 Mar 2001 21:38:27
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I see that the Bentley guide suggests 10W-30 engine oil. I've been using 20W-50 because I heard it has better hotter weather properties. The Bentley guide suggests 15W-40 oil for "extremely hot climates". What exactly is "extremely hot climates"? Is that just for places like the Sahara or Death Valley, or can that describe the smoggy, traffic-congested San Fernando Valley (Los Angeles) in summer? Temperatures routinely get into the triple digits and there's stop-and-go traffic I get stuck in. I don't want to use any kind of synthetic though, as I've heard that using synthetic after your car has higher milage (mine's at 140,000 miles) will often cause gaskets to leak synthetic. So I'm changing my oil this weekend and I'm going to switch to either 10W-30 or 15W-40. Which one should I choose? If I choose 15W-40, will I have to change back when temps drop to the 40's and 50's at night during winter? BTW, I have an '85 900 Turbo 16v. Thanks in advance.
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