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engine oil - 5W30 vs 10W-30?

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11-06-2008, 18:25	#1 (permalink)
elephantEngine Registered User Join Date: Nov 2008 Posts: 1	engine oil - 5W30 vs 10W-30? My 1995 Mustang GT owner's manual specs 10W30 oil for temps above 0 F. My local mechanic just put in 5W40, which is spec'd for below 0, and listed as "acceptable" for below 60 F. Should I make him change it out for 10W30?

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06-13-2009, 09:41	#2 (permalink)
keith28fykerd Registered User Join Date: Jun 2009 Posts: 31	Re: engine oil - 5W30 vs 10W-30? 10-30 yes , im glad i change my own oil in my veh,s

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