jerseyjim wrote:
Leaving the oil (with only 1000 miles on it) unchanged for the winter should not do the motor any harm.
When my coach is in "storage" (not used for a few months) every 2-3 weeks I start the motor and the genny and let them run for about 1/2 hour.
Letting it sit with 1000 mile oil in it is no worse than running it with the same 1000 mile oil.
Starting it periodically is good....IF.....
You have no access to power for battery tenders AND you let each engine run long enough to get thoroughly HOT to burn off any condensation that forms. Along with that, you should move the rig a few inches to distribute the "flat spot" on the tires.
If you have power for battery maintenance, there really is no NEED to start the engines periodically.