I use the multi grade 10-40 HD oil. Usually labeled for Trucks or
4x4s. I only boat in warm weather.

wrote:
In my GM 140 (3.0) I use Havaline 15-40 That's the same stuff that was
recomended in the Mustang 5.0 H.O. engines. I've used it for quite a
while. I know there's probably better oils out there, but theres
lesser oils too.


Big gus wrote:
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m