Re: what does the first number mean? - Saab General Bulletin Board - Saabnet.com
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Re: what does the first number mean?
Posted by Todd N (more from Todd N) on Thu, 16 Oct 2003 09:33:49
In Reply to: what does the first number mean?, nt moore, Thu, 16 Oct 2003 09:02:29
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The 0 means at cold temps or cold start it acts as a 0 weight oil, the lightest available. Makes cold starts easier and the oil pumps up faster than a heavier oil would under the same conditions. This is good, it gets to all the moving parts quicker. The 40 is what weight the oil is at operating temp. It is heavier and provides more protection for the engine, especially turbocharged engines at operating temp.
0W-40 is a good choice for most SAAB turbo engines. I use it in my 2000 9-3 and in my '94 turbo convertible.
Todd
'90 900
'94T-conv.
'00 9-3SE
posted by 207.172.10...
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