A. Unfortunately, there is not one correct answer to this question as performance varies greatly on usage, environment and overall conditions.
With that being said, we have not seen any decline in engine oil drain intervals as a result of going with 2010 engine designs. It’s always important to know the engine manufacturer’s recommendations and match a fleet’s operating condition with the engine oil drain / change intervals.
Similar to the above, with viscosities, environment is crucial to determine the proper viscosity.
As for Truck Maintenance Council, we will be in attendance at the fall conference and have a booth at the winter.