Trojan Boat Forum

an 87 with with 454 crusaders, I know it is in my manuel, but that is on the boat. and I know last time it was not a multi weight oil, and that is what the box stores all seem to stock, so it was hard to find. so what is the best for this, thanks in advance.

We just had this discussion. Nonetheless, use 15-40 and you'll be fine.

Thats what I used in my last 7 (?) boats and its what I use in almost all I work on ( I use straight 40W in 2 cycle Detroit Diesels )