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why do shops use 20w50 as the oil weight of choice? 200

posted by  Sumerduckman on  Tue Dec 7 07:29 CST 2004
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last visit: Tue Aug 21 11:31 CST 2007
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I am really surprised that your local 'Volvo' indie shops are using the 20/50. Every Volvo manual I have seen says to not use anything thicker than 15/40, with 15/40 reserved for high speed/high temp duty. Some of the dealers around here (Va.) used the 15/40 up until about 10 years ago, and then most switched to 10/30 year round. I use 5w/40 synthetic year round in my 240, only because my son is now driving it full time. Used to use 10/30 year round. The 5/40 is a more robust oil, so the maintenance schedule can be a little more flexible, and he is one of those folks that thinks a gas pedal is an on/off switch. Not a variable speed device. Definitely severe service.
--
'94 940 150k, '86 240 170k, '72 142 KIA, '70 144 KIA, '69 144 RIP






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