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0w-40 oil OK in 945? 900

posted by  spook on  Wed Jan 14 10:11 CST 2004
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last visit: Fri Oct 24 08:06 CST 2014
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Dear zimmiefan,

Good p.m. and may this find you well. Ich heisse mich nicht "Herr Ludwick" und Ich kann ihn nicht! Glad to hear you're using Mobil1.

I used to live in the Midwest, and so met with temps comparable to yours in Vermont. I ran 5W-30 in a 240 series car in the winter, and switched to 10W30 in the summer.

A lighter weight oil makes sense in extreme cold: it will be less viscous and so get to where its needed faster. It will also ease strain on the starter/battery.

That said, I would not run 0w-40 in the summer: it is too thin for the heat of a Vermont summer. I would switch to 10W30 about 1 April and keep it in until 1 December, or a tad later.

I use Mobil1 10W30 year-round, here in the northeast, as my car is almost always garaged. As a result, the block temp does not drop to ambient.

Hope this helps.

Yours faithfully,

spook






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