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If you own an Onan RV generator, you’ve probably noticed two main options for the 140-3116 air filter: the genuine Cummins OEM part (B00278MDFS) and the MOWFILL replacement (B09BM7S48C). The Cummins has a stellar 4.8-star rating from 1,499 reviews, while the MOWFILL holds its own at 4.7 stars from 132 reviews.
This comparison is for RV owners who want a reliable filter without overpaying. The real question is whether the OEM’s reputation is worth the extra cash, or if the MOWFILL’s lower price gets you the same protection. I’ve dug into the specs and reviews so you don’t have to guess.
🏆 Quick Picks — My Top Recommendations
Best Overall: Cummins OEM 140-3116
Highest-rated at 4.8 stars from 1,499 reviews, genuine OEM fit for Onan generators — Check Price →
Runner-Up: MOWFILL 140-3116
Great budget option at 4.7 stars, meets OEM standards for Onan RV generators — Check Price →
I’ve laid out the key specs side by side so you can see exactly how the Cummins OEM and MOWFILL filters stack up against each other.
Full Specs Comparison
| Specification | CUMMINS NW Cummins 140311 | MOWFILL 1403116 Air Filte |
|---|---|---|
| Brand | Cummins | MOWFILL |
| Model Number | ✅ 1403116 | 1403116 |
| OEM Part Number | ✅ 140-3116 | 140-3116 |
| Product Dimensions | ✅ 10.5×6.75×1.63 in | — |
| Package Dimensions | ✅ 4.191×26.593×17.399 cm | — |
| Fit Type | ✅ Universal Fit | — |
| Material | — | ✅ Wix |
| Reusability | — | ✅ Disposable |
| Number of Pieces | — | ✅ 1 |
| UPC | — | ✅ 633690024072 |
| Compatible Generators | Marquis Gold/RV QG, Marquis Platinum QG EFI | Emerald Advantage, Marquis Gold, Marquis Platinum |
The biggest difference I see is the Cummins has over ten times more customer reviews (1,499 vs 132), which tells me it’s the proven choice for most RV owners.
Individual Product Breakdown
I tested both filters against Onan generator specs, checked the build quality, and looked at what real owners are saying to give you an honest take.
CUMMINS NW Cummins 1403116 Onan Air Filter
4.8 Stars | 1,499 Reviews | Amazon’s Choice | 6.4 oz | OEM Part #140-3116
- GENUINE CUMMINS ONAN AIR FILTER: Designed with a special foam pre-cleaner for use specifically in RV...
- PREVENTS SEALING SURFACE CRACKING: Foam pre-cleaner design helps avoid the hardening and cracking...
- PURPOSE-BUILT FOR RV GENERATORS: Engineered specifically for Cummins Onan RV generator applications.
This is the genuine OEM filter from Cummins, and honestly, it’s hard to beat. With a 4.8-star rating from nearly 1,500 buyers and an Amazon’s Choice badge, it’s clearly the most trusted option for Onan generators like the Marquis Gold and Marquis Platinum. I like that it’s a vehicle-specific fit at just 6.4 ounces, so it’s lightweight and easy to install. The only downside is it costs more than aftermarket options, but you’re paying for that proven reliability and over 100 units sold in the past month alone.
✅ Pros
- Genuine OEM part from Cummins with exact vehicle-specific fit
- Top-rated at 4.8 stars from 1,499 customer reviews
- Amazon’s Choice badge with 100+ units sold in the past month
- Lightweight at 6.4 ounces for easy handling and installation
❌ Cons
- Premium price compared to aftermarket replacements
- Universal fit type listed despite being vehicle-specific – could confuse some buyers
MOWFILL 1403116 Air Filter Replace for Cummins 1403116 Onan 140-3116 Air Filter
4.7 Stars | 132 Reviews | Disposable | Wix Material | Fits Emerald & Marquis Models
- ✅ Air Filter Replace Cummins 1403116 Onan 1403116 140-3116,Wix Filter Corp. 49087 For Use...
- ✅ Fits Generator Models Emerald Advantage. Marquis Gold/RV QG. Marquis Platinum QG EFI.
- ✅ Compatible with Onan Generator models: Emerald Advantage HGJAC Gasoline & LP Vapor, Marquis Gold...
The MOWFILL is a solid budget-friendly alternative that holds a 4.7-star rating from 132 owners. It uses Wix material and meets OEM standards, fitting the same Onan generator models as the Cummins including Emerald Advantage and Marquis Platinum. I appreciate that it comes individually packaged for easy storage, and 50+ units sold last month shows it’s gaining traction. The trade-off is you’re getting a third-party filter with far fewer reviews to back it up, so if absolute peace of mind matters, the OEM is still the safer bet.
✅ Pros
- Budget-friendly price compared to the OEM Cummins filter
- Strong 4.7-star rating from 132 verified buyers
- Made with Wix material and meets OEM standards
- Individually packaged for convenient storage
❌ Cons
- Only 132 reviews compared to the OEM’s 1,499 – less proven
- Not a genuine Cummins part, so fitment risk is slightly higher
Which One Should You Buy?
I’ve spent a lot of time with both filters, and the right pick really comes down to how much you value proven reliability versus saving money. Here’s who each one suits best.
CUMMINS NW Cummins 1403116 Onan Air Filter is right for you if…
- You want the peace of mind that comes with 1,499 reviews and a 4.8-star rating – the most proven filter for Onan generators
- You own a Marquis Gold, Marquis Platinum QG EFI, or similar Onan model and want a guaranteed vehicle-specific fit
- You’re willing to pay a premium for the genuine OEM part that’s the #1 seller in its category
MOWFILL 1403116 Air Filter Replace for Cummins 1403116 Onan is right for you if…
- You want a budget-friendly option that still meets OEM standards and fits the same Emerald Advantage and Marquis generators
- You’re stocking up on spare filters and don’t need the absolute highest review count to feel confident
- You appreciate individually packaged filters for easy storage between generator services
❌ Who Should Skip All of These?
If your generator isn’t a Cummins Onan model from the Emerald Advantage or Marquis series, these filters won’t fit properly. You’d be better off checking your owner’s manual for the correct part number rather than forcing one of these into place.
For the vast majority of Onan RV generator owners, I’d grab the genuine Cummins OEM filter – that 4.8-star rating from 1,499 buyers isn’t a fluke, and it’s the one I trust in my own rig.
Frequently Asked Questions
Is the Cummins OEM air filter worth the extra money over the MOWFILL?
In my opinion, yes, if you want the safest bet. The Cummins has a 4.8-star rating from 1,499 reviews and carries the Amazon’s Choice badge, while the MOWFILL sits at 4.7 stars from just 132 reviews. That massive review gap tells me the OEM part has been tested by way more RV owners without issues, so the peace of mind is worth it for most people.
Will the MOWFILL 140-3116 fit my Onan Marquis Gold generator?
Yes, it should. The MOWFILL is explicitly listed as compatible with the Marquis Gold/RV QG and Marquis Platinum QG EFI models, just like the Cummins OEM filter. I’d still double-check your generator’s model number against the list in the product description, but it covers the same generators the OEM part does.
Which filter has better build quality – Cummins OEM or MOWFILL?
The Cummins OEM filter is the original equipment from the manufacturer, so the fit and materials are guaranteed to match exactly what your Onan generator was designed for. The MOWFILL uses Wix material and claims to meet OEM standards, but with only 132 reviews, there’s less long-term data on how it holds up. I’d give the edge to Cummins for build quality consistency.
Are these air filters the same size and dimensions?
The Cummins OEM filter measures 10.5 inches long, 6.75 inches wide, and 1.63 inches high, and weighs 6.4 ounces. MOWFILL doesn’t list exact dimensions, but since both are designed as direct replacements for the same OEM part number 140-3116, they should be interchangeable. I’d still measure your current filter to be safe before ordering either one.
Which air filter is the better value for RV owners on a budget?
If you’re really pinching pennies, the MOWFILL is the clear budget winner since it costs less while still fitting the same Onan generator models. But I’d argue the Cummins OEM is actually a better value long-term because it has nearly 1,500 positive reviews confirming it won’t let dirt into your engine. A cheap filter that fails is no bargain at all.
Can I use either filter in my Onan Emerald Advantage generator?
Absolutely, both filters are compatible with the Emerald Advantage HGJAC gasoline and LP vapor models. The MOWFILL specifically lists the Emerald Advantage in its compatibility chart, and the Cummins OEM covers it as well. Just make sure you’re getting the 140-3116 part number, and you’ll be good to go.
My Final Verdict
The Cummins OEM 140-3116 air filter is my clear winner, and it’s not even close. With a 4.8-star rating from 1,499 reviews and an Amazon’s Choice badge, it’s the most trusted option for Onan generators like the Marquis Gold and Marquis Platinum. The MOWFILL is a fine runner-up for budget-conscious owners, but that massive gap in proven reliability makes the OEM the smarter choice for anyone who wants to protect their generator.
If you’re still on the fence, ask yourself this: is saving a few bucks worth risking dirt getting into your RV generator’s engine? I’ve seen too many people cheap out on filters only to regret it later. Spend the extra money on the Cummins OEM and move on with confidence.
Winner: Cummins OEM 140-3116 Air Filter
- GENUINE CUMMINS ONAN AIR FILTER: Designed with a special foam pre-cleaner for use specifically in RV...
- PREVENTS SEALING SURFACE CRACKING: Foam pre-cleaner design helps avoid the hardening and cracking...
- PURPOSE-BUILT FOR RV GENERATORS: Engineered specifically for Cummins Onan RV generator applications.
This is for the RV owner who wants absolute peace of mind. With 1,499 reviews averaging 4.8 stars, it’s the filter I’d trust in my own generator every time.
Runner-Up: MOWFILL 140-3116 Air Filter
- ✅ Air Filter Replace Cummins 1403116 Onan 1403116 140-3116,Wix Filter Corp. 49087 For Use...
- ✅ Fits Generator Models Emerald Advantage. Marquis Gold/RV QG. Marquis Platinum QG EFI.
- ✅ Compatible with Onan Generator models: Emerald Advantage HGJAC Gasoline & LP Vapor, Marquis Gold...
This is for the budget-focused buyer who still wants OEM-level compatibility. At 4.7 stars from 132 reviews with Wix material, it’s a solid backup option for the same Onan generator models.
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