Thread: break in oils
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Old 07-15-2007, 03:55 AM
P.J. P.J. is offline
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Default Re: break in oils

What about the hd 30 oil for the first 3000 miles
I know that adding the GM additive OAS helps too??.
Is HD 30 oil ok for the brake in period. I dont want to use 10 w 30 as some people have recommended. The 427 425 hp motor
I think needs a heavier oil.
PJ
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