Quote Originally Posted by GJH View Post
I used what Detroit specifically recommends : nothing. If the boat is going to be stored and not used for a long time, they say use some Biobor

Read their fuel specifications and you will note they are looking for as LOW a sulfur content as possible.
Not true.

5hey called for lower than 500 ppm. Today's low sulpbur fuel is coomed tonremove sulphur and in the process lowers lubrucity. Detroit ztates if lubricitybdrops it can be replaced with additive. They call for under 500 um scarring or add lubricity.