Gen oil filter
I have a Onan 5.5 Gen and I just checked the last time I changed oil! It has been a year and 8 months and 14 hours! Should I still change oil and filter with that few of hours ??
Forum Discussion
You have gotten answers, but none are complete in my book.
The problem with 20 months and 18 hours is that you ran the engine at all. Combustion by-products are acidic. There are corrosion inhibitors in the lube oil that will go bad with just exposure to air and they get bad even faster with combustion by-products. Even Mobil 1 says one year maximum.
You do not need to change the filter, but it is not much work to remove it and drain it so that contaminated oil is also out of the engine.
Much of the time I worked on shore was doing engine testing.
Matt
The problem with 20 months and 18 hours is that you ran the engine at all. Combustion by-products are acidic. There are corrosion inhibitors in the lube oil that will go bad with just exposure to air and they get bad even faster with combustion by-products. Even Mobil 1 says one year maximum.
You do not need to change the filter, but it is not much work to remove it and drain it so that contaminated oil is also out of the engine.
Much of the time I worked on shore was doing engine testing.
Matt
