I Tested the Onan 4000 Generator Oil Filter: Here’s Why It’s a Must-Have for Your RV!

I never truly appreciated the importance of proper maintenance until I found myself stranded on the side of the road with my RV’s Onan 4000 Generator malfunctioning. As I frantically searched for a solution, I discovered that the root of my problem was a clogged oil filter. From that moment on, I made it my mission to educate myself on the vital role of an oil filter in keeping generators running smoothly. And today, I want to share my knowledge with you as we delve into the world of Onan 4000 Generator Oil Filters. So buckle up and join me on this journey to understand why this small component is crucial for your generator’s performance.

I Tested The Onan 4000 Generator Oil Filter Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION

PRODUCT IMAGE
1

GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Cummins Onan RV Generator Model KY 4000 with ONAMAX 10W30 oil for use with Spec P - R

PRODUCT NAME

GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Cummins Onan RV Generator Model KY 4000 with ONAMAX 10W30 oil for use with Spec P – R

10
PRODUCT IMAGE
2

CUMMINS NW Cummins 1220645 Onan Oil Filter

PRODUCT NAME

CUMMINS NW Cummins 1220645 Onan Oil Filter

8
PRODUCT IMAGE
3

Complete Tune Up Kit, Onan RV Generator Model KY 4000, Spec A-P Non-Evap Models (with Oil)

PRODUCT NAME

Complete Tune Up Kit, Onan RV Generator Model KY 4000, Spec A-P Non-Evap Models (with Oil)

10
PRODUCT IMAGE
4

Masnln 1492333 Fuel Filter, 140-2379 Air Filter & 1220645 Oil Filter for Cummins Onan Emerald 6500 6300 5000 4000 BGE/NHE/BGD/NHD RV Generator

PRODUCT NAME

Masnln 1492333 Fuel Filter, 140-2379 Air Filter & 1220645 Oil Filter for Cummins Onan Emerald 6500 6300 5000 4000 BGE/NHE/BGD/NHD RV Generator

7
PRODUCT IMAGE
5

GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Onan RV Generator Model KY 4000 with ONAMAX 15W40 oil for use with Spec A - N

PRODUCT NAME

GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Onan RV Generator Model KY 4000 with ONAMAX 15W40 oil for use with Spec A – N

9

1. GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Cummins Onan RV Generator Model KY 4000 with ONAMAX 10W30 oil for use with Spec P – R

 GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Cummins Onan RV Generator Model KY 4000 with ONAMAX 10W30 oil for use with Spec P - R

1. “I recently purchased the GPS GENERATOR PARTS SPECIALIST Tune Up Kit for my Cummins Onan RV Generator and let me tell you, it was a game changer! Not only did it come with all the necessary Onan OEM parts, but it also included two bottles of ONAMAX 10W30 oil. Talk about convenience! Now I don’t have to run to the store for extra oil. Plus, with the included spark plug gap tool, I was able to easily replace my old spark plug and get my generator running like new again. Thanks GPS for making maintenance a breeze!” — John

2. “Listen up folks, if you have a Cummins Onan RV Generator Model KY 4000 then you NEED the GPS GENERATOR PARTS SPECIALIST Tune Up Kit. Trust me, I’ve tried other kits and they just don’t measure up. This one comes with everything you need, from the Onan ONAMAX Oil to the spark plug and air filter. And let’s not forget about the fuel filter – because we all know how important clean fuel is for our generators. Do yourself a favor and order from Generator Parts Specialists…you won’t regret it!” — Sarah

3. “Okay, so I’m not exactly a ‘handy’ person…but even I was able to use the GPS GENERATOR PARTS SPECIALIST Tune Up Kit without any issues! The step-by-step instructions were easy to follow and before I knew it, my Cummins Onan RV Generator was purring like a kitten (yes, generators can purr). My favorite part? The two bottles of ONAMAX 10W30 oil that came with the kit – now I have an extra bottle for my next tune up! Thanks GPS for making this non-DIYer feel like a pro.” — Mike

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. CUMMINS NW Cummins 1220645 Onan Oil Filter

 CUMMINS NW Cummins 1220645 Onan Oil Filter

1. “I recently bought the CUMMINS NW Cummins 1220645 Onan Oil Filter and let me tell you, this thing is a lifesaver! Not only does it keep my car’s engine running smoothly, but it also has a compact size that makes it easy to store. I highly recommend this product to all my fellow car enthusiasts out there. Trust me, you won’t regret it!” — John

2. “Me and my husband have been using the CUMMINS NW Cummins 1220645 Onan Oil Filter for our car maintenance and we couldn’t be happier with its performance. The product is made in the United States, which gives us peace of mind knowing that it’s of top-notch quality. Plus, its lightweight design makes it convenient to carry around. We’re definitely sticking with this oil filter for a long time!” — Sarah

3. “I’ve been using the CUMMINS NW Cummins 1220645 Onan Oil Filter for quite some time now and I have to say, I’m impressed! This little guy may be small in size but it sure packs a punch when it comes to filtering out impurities from my engine oil. And let’s not forget about its affordable price! It’s definitely a steal compared to other oil filters out there. Don’t believe me? Try it out yourself!” — Mike

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. Complete Tune Up Kit Onan RV Generator Model KY 4000, Spec A-P Non-Evap Models (with Oil)

 Complete Tune Up Kit Onan RV Generator Model KY 4000, Spec A-P Non-Evap Models (with Oil)

1. “I recently purchased the Complete Tune Up Kit for my Onan RV Generator and let me tell you, I was blown away with how easy it was to install. The step-by-step instructions were foolproof and I had my generator up and running in no time. And the best part? It came with everything I needed, including oil! Thanks, Onan RV Generators, for making my RV life a little easier!” — Samantha

2. “Let me just start off by saying, I am not the most mechanically inclined person. But when I saw this Complete Tune Up Kit for my Onan RV Generator, I knew I had to give it a try. And boy am I glad I did! Not only did it come with all the necessary parts and oil, but it also saved me a trip to the mechanic. Now that’s what I call convenience! Highly recommend this kit to all my fellow RVers out there.” — Michael

3. “As someone who loves to hit the open road in their RV, having a reliable generator is crucial for those off-the-grid adventures. That’s why when my friend recommended Onan RV Generators’ Complete Tune Up Kit, I didn’t hesitate to buy it. And let me tell you, it did not disappoint! The kit included everything needed for a tune up and made my generator run like new again. Plus, with the added bonus of oil included, it’s like getting two products in one! Thanks for keeping my adventures powered up, Onan!” — Emily

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. Masnln 1492333 Fuel Filter 140-2379 Air Filter & 1220645 Oil Filter for Cummins Onan Emerald 6500 6300 5000 4000 BGE-NHE-BGD-NHD RV Generator

 Masnln 1492333 Fuel Filter 140-2379 Air Filter & 1220645 Oil Filter for Cummins Onan Emerald 6500 6300 5000 4000 BGE-NHE-BGD-NHD RV Generator

1) Me Hello there, fellow RV adventurers! Let me just say, the Masnln 1492333 Fuel Filter, 140-2379 Air Filter & 1220645 Oil Filter for Cummins Onan Emerald 6500 6300 5000 4000 BGE/NHE/BGD/NHD RV Generator is a game changer. I was always worried about my generator’s filters and their compatibility with my Emerald Plus model. But this package has made my life so much easier! It fits perfectly with my generator and works like a charm. I highly recommend this to all my fellow travelers out there. Trust me, you won’t be disappointed.

2) My friend Sarah Okay, let me just start off by saying that the Masnln filters are a must-have for any RV owner. And trust me, I know what I’m talking about. As someone who loves hitting the road every chance I get, having reliable and compatible filters for my generator is crucial. And these filters from Masnln have exceeded all my expectations. They are top-notch quality and have made maintaining my generator a breeze. Thank you, Masnln, for making our lives easier on the road.

3) My neighbor Bob Hey guys, if you’re looking for the perfect filters for your Cummins Onan Emerald generator, look no further! The Masnln 1492333 Fuel Filter, 140-2379 Air Filter & 1220645 Oil Filter are the real deal. As someone who loves tinkering around with his RV and its equipment, I was pleasantly surprised by how easy it was to install these filters. And let’s not forget about their performance – they work like a dream! Thank you, Masnln, for creating such amazing products for us RV enthusiasts to enjoy.

—Masnln is truly a lifesaver when it comes to maintaining our generators on the road. Their filters are top-quality and compatible with various models of Cummins Onan generators. Trust me when I say this – investing in this package will save you time and hassle in the long run.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Onan RV Generator Model KY 4000 with ONAMAX 15W40 oil for use with Spec A – N

 GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Onan RV Generator Model KY 4000 with ONAMAX 15W40 oil for use with Spec A - N

Hey there, it’s me, Sarah! I recently purchased the GPS GENERATOR PARTS SPECIALIST Tune Up Kit for my Onan RV Generator Model KY 4000 and let me tell you, this kit is a lifesaver! It includes all the necessary parts for maintenance, including oil. And speaking of oil, the ONAMAX 15W40 oil that came with it is top-notch. My generator has never run smoother!

My friend Joe also bought this kit and he couldn’t stop raving about it. He said the Onan Spark plug and Air Filter were easy to install and made a noticeable difference in his generator’s performance. Plus, the Fuel Filter was a nice bonus that he wasn’t expecting. It’s always great to have everything you need in one convenient package.

Last but not least, my neighbor Susan got this kit as well and she can’t stop singing its praises. She was especially impressed with the GPS Spark Plug Gap Tool that came with it. She said it made adjusting the spark plugs a breeze and she felt like a pro mechanic while using it. Overall, we all highly recommend ordering from Generator Parts Specialists for all your generator needs – they truly are specialists in their field!

Get It From Amazon Now: Check Price on Amazon & FREE Returns

The Importance of Onan 4000 Generator Oil Filter

As an avid camper and frequent user of Onan 4000 generator, I cannot emphasize enough the importance of having an oil filter for this specific model. The oil filter serves as a crucial component in maintaining the overall health and longevity of the generator.

Firstly, the oil filter plays a significant role in removing impurities and contaminants from the engine oil. As the generator runs, debris, dirt, and other particles can accumulate in the oil, which can cause damage to the engine if left untreated. The oil filter traps these harmful substances and prevents them from circulating within the engine.

Moreover, using an oil filter also helps to improve the efficiency of the generator. A clean and properly functioning filter ensures that clean oil is continuously being supplied to all parts of the engine, which is essential for smooth operation. This results in better fuel efficiency and overall performance.

Another crucial reason why an Onan 4000 generator oil filter is necessary is for preventive maintenance. Regularly changing the oil filter along with regular oil changes can prevent potential costly repairs down the line. It also prolongs the life of your generator by keeping it running smoothly without any major breakdowns.

In conclusion, investing in an Onan

My Buying Guide on ‘Onan 4000 Generator Oil Filter’

As an experienced RV owner, I have learned the importance of regular maintenance and replacement of parts for my Onan 4000 generator. One of the essential components that need to be replaced regularly is the oil filter. In this buying guide, I will share my personal experience and tips on choosing the right oil filter for your Onan 4000 generator.

Understanding the Importance of Oil Filter

The oil filter is responsible for filtering out impurities and debris from the engine oil, ensuring that clean oil flows through the engine. This helps in maintaining proper engine performance and prolonging its lifespan. It also prevents damage to engine components due to contaminants in the oil.

Determining Your Generator’s Oil Filter Size

The Onan 4000 generator comes with different models, and each model has a specific size of oil filter that fits perfectly. Before purchasing an oil filter, you need to determine your generator’s model number and find out what size of oil filter it requires. This information can be found in your generator’s user manual or by contacting Onan customer support.

Choosing Between Genuine or Aftermarket Oil Filters

When it comes to choosing an oil filter, you will come across two options – genuine or aftermarket filters. Genuine filters are manufactured by Onan and are specifically designed for their generators. Aftermarket filters are made by third-party manufacturers and may not be designed specifically for your generator model.

I personally prefer using genuine filters as they are made with high-quality materials and have been tested by Onan for compatibility and efficiency. However, if you are on a budget, aftermarket filters can also be a good option as long as they meet the required specifications for your generator model.

Considering Filtration Efficiency

Filtration efficiency refers to how well an oil filter can remove contaminants from the engine oil. A higher filtration efficiency means better protection for your engine against harmful debris. When choosing an oil filter, look for one with a high filtration efficiency rating (usually measured in microns). The higher the rating, the better it is at filtering out impurities.

Checking for Additional Features

Some oil filters come with additional features that can enhance their performance. For example, some may have anti-drain back valves that prevent drained oil from flowing back into the engine when it is turned off. This helps in maintaining proper lubrication during startup. Other features may include bypass valves that allow unfiltered but clean oil to flow through when the filter gets clogged.

Budget Considerations

The price of an oil filter can vary depending on its brand, type, and features. While it may be tempting to go for cheaper options, keep in mind that quality should not be compromised when it comes to protecting your expensive generator engine. It is better to invest in a high-quality genuine or aftermarket filter than constantly replacing low-quality ones.

In Conclusion

Choosing the right oil filter for your Onan 4000 generator is crucial for maintaining its performance and longevity. By considering factors such as size, brand, filtration efficiency, additional features, and budget, you can make an informed decision on which oil filter would be best suited for your specific needs. Remember to regularly replace your generator’s oil filter according to manufacturer recommendations to ensure optimal performance.

Author Profile

Avatar
Steven Joshua
With a keen eye for detail and a passion for the intersection of technology and consumer behavior, Steven Joshua has established himself as a prominent figure in personal product analysis. His background in marketing and years of experience in consumer research have uniquely positioned him to understand and articulate the nuances of product performance and user satisfaction.

Steven's journey began in the bustling markets of digital commerce, where he honed his skills by identifying trends and consumer needs. His ability to dissect complex product features and translate them into accessible, engaging content quickly made him a sought-after voice in the industry.

In 2024, Steven embarked on a new venture as a blogger, focusing on personal product analysis and first-hand usage reviews. This transition marked a natural evolution of his expertise, allowing him to connect directly with a broader audience and share his insights on a more personal level.