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

posted by  Aye Roll on  Mon Dec 6 23:39 CST 2004
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last visit: Tue Oct 14 21:08 CST 2014
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Here, the specialty shops all use 15W40, and the dealer uses Pennzoil. Apparently that's what Volvo recommends. Most seem to use the same oil year round.
I run 15W40 in summer and 10W30 in winter. 15W40 is a bit heavy for areas where you will encounter freezing temperatures. 10W30 seems to be a better choice but still fine for warmer days or long trips where the oil warms fully.
--
Rob Bareiss, New London CT ::: '87 244DL/M47- 234K, '82 245T/M46-182K, '89 244DL/AW70- 212K Not too distant past: 86 244DL 215K, 87 244DL 239K, 88 744GLE 233K, 88 244GL 147K, 91 244 183K






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