Quote:
Originally Posted by lewdog
Question that hopefully Jason can answer but anyone else can chime in as well. The Stang has run Royal Purple 5W20 (recommended) in it it's whole life. I am changing the oil this weekend. I don't mind sticking with Royal Purple and probably will, but should I be using something other than the manufacture's recommendation of 5W20 since it's so hot here in Phoenix....maybe 5W30 instead since the oil thins at high temperatures anyway?
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Cars almost everywhere run at 210 all the time. I would stick with 5-20