This will be our first fall/winter with a 4 stroke and I'm curious if I should swap oils due to cold temperatures. We are running Rotella T15-40 currently but I'm thinking as the temps start dropping perhaps we should switch to the synthetic Rotella 5-40. We will see morning temps in the low 30's for some of these races. During the winter he will want to ride at an indoor AX facility but the bike is in an unheated environment prior to riding and could see temps close to 0.
The reason I ask is I've had folks who attribute engine failures to the oil being too thick to make it through the scavenge screens and filters.
The reason I ask is I've had folks who attribute engine failures to the oil being too thick to make it through the scavenge screens and filters.