C3517C
Member
I have a 1995 Four Winns boat with a Ford 5.0 V-8. It stays in the garage when I'm not on the water and its in very good condition. The manual for oil changes says "Use only SAE 30, single viscosity oil. Do not use multi-viscosity oil such as 10W-30, or 10W-40". OK, I get it. However, this manual is 18 years old and I can't find SAE 30 any more. I see that Amsoil has 0W-30. Can I assume that 0W-30 is the same thing as SAE 30 ?