Re: 1962 305d model 3000 What Oil Too Use
I use Shell Rotella straight 30wt, that is what these engines were designed around. In 1964 I had a brand new 1964 GMC 3/4T pickup I put 100,000 miles on it in two years, running up and down the East Coast with my Top Fuel Dragster I had an 8 foot aluminum camper and an custom enclosed trailer for the car. The truck never missed a beat.
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Clyde McKaba
Abbeville,SC
1961 GMC Suburban 4WD 305 V6, 4spd
1966 GMC 3/4T P/U 351 V6, Turbo 400,Gear Vender OD
1969 GMC Suburban 1/2T
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