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**78 Big10 454** · 10-07-2011, 02:36 AM

I strictly use 30W in my '78.

10-07-2011, 02:36 AM	#6
78 Big10 454 78 Big10 454 Join Date: Jul 2008 Location: Pismo Beach, CA Posts: 841	Re: What's the best oil for a old tired engine? I strictly use 30W in my '78.