Quote:
Originally Posted by Pete'sMH
The owners manual recommends the 15w40 but is ok with 30w if it’s going to be hot. But why wouldn’t you use the multi weight? I went to south Texas last month expecting 70 degrees but I found myself doing a cold start at 14 degrees at 4:00 in the morning. Fired right up and ran for MANY hours over the next several days. It only holds 1.6 quarts so I generally use the Onan branded oil - which is silly expensive at about $6/qt. But really, if you change it once a year $9 isn’t gonna kill you.
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Is it ok to use the synthetic 15/40?
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