07-26-2018, 08:41 PM
At least by 1990, all the 8V92 Newells carried a plate in the engine compartment with the recommendation to run Mobil Delvac 1. When I bought my coach, Newell told me they had great success with Delvac 1 in the 8V92 although other sources are vehement that using multi weight oil is a big NO-NO for the 8V92. I do not know who is correct but I have always used a low ash single viscosity 30 weight oil in mine since the bus companies that run 8V92's all seem to use low ash single viscosity 40 weight which is Detroit Diesel's recommendation.