Thread: Viscosity debate....
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Old 05-08-2008, 06:17 AM
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lowmileage lowmileage is offline
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Quote:
Originally Posted by rgrimm View Post
You want to avoid too much of a spread, so I'd stay away from 5W-50 for sure.
I'm not certain but the "spread of the numbers theory" might be different (may not apply as in the case for dino oils) for syn oils. I know it is for M1 5w-30 which in a dino contains more than the ideal mix of VII's but is good in the M1 instance.

why is 10w-40 bad? - Ford Truck Enthusiasts Forums

Oil. - Dodge Caliber Forums see post #4

ps. 20w-50 in a dino is OK . Theory blown in that instance too.
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Last edited by lowmileage; 05-08-2008 at 06:30 AM.
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