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#1
03-25-2006, 12:00 AM
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Oil....
My 1999 Tahoe has a 5.7L engine. What weight oil is suggested to be used? I've heard that no matter what oil is suggested, that you should use 10w-30 in the winters and then 10w-40 in the summers because it holds up to heat better. What is everyone's feedback? Are there any prefered manufacturers?
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#2
03-25-2006, 10:35 AM
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Re: Oil....
I run 10w30 year round in my 94 K1500 5.7L and in my wifes 02 S10 Crew 4.3L. I use valvoline, castrol gtx is also an excelent oil. For synthetic oil I would use Royal Purple.
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NO 4 N JUNK  1994 GMC K1500 XC 5.7L 2008 Chevy Impala LTZ
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