15w40 oil for Onan gas generator

[John & Diane]

I can not find 15w40 with the SJ or higher Class as required by the Operators manual of the Onan 4000w gen in our MH. According to a tag on the generator it came with 15w40.The only 15w40 I can find is for diesel engines. Unless someone knows where to find 15w40 I'll be using 10w40.I'm probably over thinking this, but I prefer to use what originally came in the unit. Thanks in advance.

John

[saddlesore]

Originally Posted by John & Diane

I can not find 15w40 with the SJ or higher Class as required by the Operators manual of the Onan 4000w gen in our MH. According to a tag on the generator it came with 15w40.The only 15w40 I can find is for diesel engines. Unless someone knows where to find 15w40 I'll be using 10w40.I'm probably over thinking this, but I prefer to use what originally came in the unit. Thanks in advance.

John

15-40 for diesel engines will work just as well in a gas or propane engines.