Originally Posted by BobandDonna
Since we no longer full time, we only put about 4,000 miles a year on our MH. I change it once a year, just before we begin our travels for the year. I use synthetic oil and a filter change along with a grease job. Check your air filter too to see if it needs cleaning or changing.
My personal opinion is (and it's what I do with, not only my cars, pickup truck and farm tractors is....
I change the oil prior to winter layup and the filters too... Here's why..
The used oil sitting in the pan and in the oil passages is contaminated with blowby and combustion by products (why it gets dark). All that stuff is in suspension in the lube oil and in contact with your bearings and all other lubricated components so why not change it and let fresh, clean oil be in contact with those parts???
I also do an oil analysis with Blackstone Labs every year when I layup my farm tractors. Good to know if I'm going to have any down the road issues internally and an oil analysis will warn you of that event.
Just the way I do it and it's not a requirement, just personal observation...