udidwht
Well-known member
Gary RV_Wizard said:Most vehicle manufacturers recommend an annual change regardless of miles. They don't know what it may have been exposed to while sitting around, plus lack of use makes contamination from water condensation likely (engine heat drives moisture away).
The only way to know with absolute certainty is via an oil analysis. Run the oil a given number of miles and send in a sample. Once you find the sweet spot (OCI) stick with it. Most name brand oils these days will easily go 5,000+ miles or more than 1 year between changes. Condensation is not from sitting alone but the actual combustion process. If one only drives short amount of miles each start up than more condensation will accumulate overtime. Get the oil up to temp to rid condensation.
My oil preference...
Valvoline VR-1 racing 10w-30 with a Mobil 1 Extended Performance filter