Will this fit my Onan QD 8000?

Yes. The 122-0833 fits all Onan Quiet Diesel (QD) generator models from 3200 through 12500, including the QD 8000.

Is this the same as the Cummins dealer filter?

This is a premium aftermarket filter manufactured to meet or exceed the same specifications. It cross-references directly with Cummins Onan 122-0833, Fleetguard LF3591, and WIX 51064.

How many oil filters do I need for a generator service?

One per oil change. The Onan QD series generators use a single oil filter.

Can I use this on a diesel truck engine?

No. This filter is specifically designed for Onan QD RV generators. While it may physically thread onto some engines, the bypass valve settings and filtration specifications are calibrated for generator applications.

What oil should I use with this filter?

SAE 15W-40 diesel-rated oil meeting API CJ-4 or CK-4 specifications. For cold climates, 5W-40 synthetic diesel oil is acceptable.

122-0833 Oil Filter for Cummins Onan RV Generator QD 3200-12500 | iFJF

Name: 122-0833 Oil Filter for Cummins Onan RV Generator QD 3200-12500 | iFJF
Brand: iFJF
SKU: FJ-0833
Price: 25.99 USD
Availability: InStock