I have a 62 Series 80 with either a 348 or 409. What engine oil should I put in it. I just got it and want to change the oil before I do much with it. I was thinking 10-30 but wanted a second opinion.


My new 1949 Chevy One Ton Dump Truck. Still have it but parked, needs a new motor.
1953 2 ton parts truck Long Gone
1957 GMC LCF On 75 Cadillac Eldorado Frame
Updated Feb 2021