Originally Posted By: Dak27
I have a 460 in my '97 F-250HD 4X4. My owners manual calls for 5W30 or 10W30. I've been using Mobil HM 5W30 for the last couple of years, and seems to do a good job. I don't put a lot of miles on the truck per year, I go 2 years per oil change.
A 97 460 is a different animal compared to a 76 460, one is carbed, with a flat tappet camshaft, the other fuel injected with a roller camshaft, a 97 would be perfectly happy on just about any decent 5W-30 or 10W-30, a 76 will need some Zddp and a little more viscosity to help with the fuel dilution.