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**'68OrangeSunshine** · 03-30-2024, 04:15 PM

I just switched the oil in the 350 in my '71 GMC Jimmy from 20W-50 to SAE 30 Valvoline VR1. Same oil I use in my '68 C/10 Stepside's 292. Logistics, mainly. One oil to rule them all. But also an old school engine works best with old school oil.
Hey, my last comment in this thread was 11 years ago.

03-30-2024, 04:15 PM	#23
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,100	Re: recommended oil weight I just switched the oil in the 350 in my '71 GMC Jimmy from 20W-50 to SAE 30 Valvoline VR1. Same oil I use in my '68 C/10 Stepside's 292. Logistics, mainly. One oil to rule them all. But also an old school engine works best with old school oil. Hey, my last comment in this thread was 11 years ago. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.