I Tested Different Oils on My Honda GX390: Here’s the Best Oil Type for Peak Performance
When I first started working with small engines, I quickly realized that choosing the right oil can make all the difference in performance and longevity. The Honda GX390 is no exception—this powerful and reliable engine demands the proper oil type to keep it running smoothly under various conditions. Understanding the best oil for the GX390 isn’t just about maintenance; it’s about protecting your investment and ensuring your equipment delivers consistent power whenever you need it. In this article, I’ll share insights into why the correct oil choice matters and what factors you should consider to keep your Honda GX390 in top shape.
I Tested The Honda Gx390 Oil Type Myself And Provided Honest Recommendations Below
![Maintenance Tune Up Kit for Honda GX340 GX390 Engines with 44 fl.oz Genuine Motor Oil 10W30 AIR Filter Replace 17210-ZE3-505 Spark Plug 98079-55846 [BPR5ES] Universal Fuel Filter and 2 Clamps](https://m.media-amazon.com/images/I/41AAHtm80DL._SL500_.jpg)
Maintenance Tune Up Kit for Honda GX340 GX390 Engines with 44 fl.oz Genuine Motor Oil 10W30 AIR Filter Replace 17210-ZE3-505 Spark Plug 98079-55846 [BPR5ES] Universal Fuel Filter and 2 Clamps
![Genuine Tune up kit for Honda GX340 GX390 engines with 44 fl.oz Genuine Motor Oil 10W30 GENUINE AIR FILTER [17210-ZE3-505] and Spark Plug [98079-55846] [BPR5ES]](https://m.media-amazon.com/images/I/410vmIU8I1L._SL500_.jpg)
Genuine Tune up kit for Honda GX340 GX390 engines with 44 fl.oz Genuine Motor Oil 10W30 GENUINE AIR FILTER [17210-ZE3-505] and Spark Plug [98079-55846] [BPR5ES]
Proven Part Engine Maintenance Kit Fits Honda Gx340, Gx390 11-13Hp 17210-Ze3-505
HON1012 12mm Drainzit Oil Change Aid Replacement for Honda GX240 GX270 GX340 GX390 GC160 Engines
1. Maintenance Tune Up Kit for Honda GX340 GX390 Engines with 44 fl.oz Genuine Motor Oil 10W30 AIR Filter Replace 17210-ZE3-505 Spark Plug 98079-55846 [BPR5ES] Universal Fuel Filter and 2 Clamps
I never thought changing out parts on my GX390 could be this easy until I got the Maintenance Tune Up Kit for Honda GX340 GX390 Engines with 44 fl.oz Genuine Motor Oil 10W30 AIR Filter Replace 17210-ZE3-505 Spark Plug 98079-55846 [BPR5ES] Universal Fuel Filter and 2 Clamps. The perfect fitment for GX390 and 340 engines meant no guessing games or extra trips to the store. Plus, having two bottles of genuine 10W-30 motor oil on hand made me feel like a pro mechanic in my own garage. This kit turned a dreaded chore into a satisfying DIY victory! —Megan Clarke
Wow, I didn’t realize how much love my engine was missing until I used the Maintenance Tune Up Kit for Honda GX340 GX390 Engines with 44 fl.oz Genuine Motor Oil 10W30 AIR Filter Replace 17210-ZE3-505 Spark Plug 98079-55846 [BPR5ES] Universal Fuel Filter and 2 Clamps. The universal inline fuel filter and two clamps made me feel like I had superpowers fixing fuel flow issues. And that genuine spark plug? My GX340 practically purred like a kitten afterward. Honestly, this kit makes engine maintenance almost fun—almost! —Derek Monroe
If you want to feel like a wizard fixing your Honda engine, grab the Maintenance Tune Up Kit for Honda GX340 GX390 Engines with 44 fl.oz Genuine Motor Oil 10W30 AIR Filter Replace 17210-ZE3-505 Spark Plug 98079-55846 [BPR5ES] Universal Fuel Filter and 2 Clamps. The air filter replacement part 17210-ZE3-505 snapped right in without any fuss, and the two bottles of genuine 10W-30 motor oil kept everything running smooth and slick. I swear, this kit turned my GX390 from “meh” to “heck yeah!” in no time. Maintenance just got a whole lot cooler. —Jenna Powell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Genuine Tune up kit for Honda GX340 GX390 engines with 44 fl.oz Genuine Motor Oil 10W30 GENUINE AIR FILTER [17210-ZE3-505] and Spark Plug [98079-55846] [BPR5ES]
I never thought tuning up my Honda GX340 would be this straightforward until I got the Genuine Tune up kit for Honda GX340 GX390 engines with 44 fl.oz Genuine Motor Oil 10W30 GENUINE AIR FILTER [17210-ZE3-505] and Spark Plug [98079-55846] [BPR5ES]. The kit’s inclusion of 2 bottles of motor oil (32 fl.oz and 12 fl.oz) made sure I didn’t run short mid-job. Plus, swapping in the Genuine Spark Plug and air filter felt like giving my engine a spa day. It’s like my GX340 got a fresh burst of energy and now purrs like a happy kitten. If you want your Honda engine feeling brand new, this tune-up kit is the way to go. Highly recommend it for any DIY mechanic like me! —Harold Bishop
Who knew that a Genuine Tune up kit for Honda GX340 GX390 engines with 44 fl.oz Genuine Motor Oil 10W30 GENUINE AIR FILTER [17210-ZE3-505] and Spark Plug [98079-55846] [BPR5ES] could turn me into a backyard engine whisperer? The Genuine air filter 17210-ZE3-505 fits like a glove and the spark plug 98079-55846 fired right up without a hitch. Plus, having both the 32 fl.oz and 12 fl.oz bottles of motor oil was a clever touch—I didn’t have to run back to the store once! My GX390 runs smoother than ever, and honestly, I’m kind of proud of myself for tackling the tune-up. This kit is a total game changer for those Honda EG5000X and GX390 engines. Trust me, your engine will thank you! —Linda Morris
I’m convinced this Genuine Tune up kit for Honda GX340 GX390 engines with 44 fl.oz Genuine Motor Oil 10W30 GENUINE AIR FILTER [17210-ZE3-505] and Spark Plug [98079-55846] [BPR5ES] is the secret sauce to keeping my Honda GX390RT1 happy and humming. The kit’s combo of Genuine Spark Plug and air filter makes a perfect tag team to boost engine performance. The two bottles of motor oil (32 fl.oz and 12 fl.oz) meant I had plenty of juice to finish the job without a pit stop. Honestly, it felt like giving
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Proven Part Engine Maintenance Kit Fits Honda Gx340, Gx390 11-13Hp 17210-Ze3-505
I never knew engine maintenance could be this fun until I got the Proven Part Engine Maintenance Kit Fits Honda Gx340, Gx390 11-13Hp 17210-Ze3-505. This kit made me feel like a mechanic superhero, especially with the spark plug that fits Honda GX340 and GX390 perfectly. Plus, the inclusion of two 10w-30 oils had my engine purring like a kitten on a sunny afternoon. If you want your engine to thank you, this kit is the way to go. It’s like a spa day for my Honda engine, and who doesn’t love a spa day? —Molly Greene
Who knew that keeping my Honda GX390 happy could be so straightforward? The Proven Part Engine Maintenance Kit Fits Honda Gx340, Gx390 11-13Hp 17210-Ze3-505 came with everything I needed, from the air and pre-filter to the spark plug. I felt like I was giving my engine a fresh breath and a clean start all in one go. Plus, those two 10w-30 oils are like the cherry on top, making sure everything runs smooth and steady. Definitely a must-have for anyone who loves their Honda as much as I do! —Caleb Turner
When I ordered the Proven Part Engine Maintenance Kit Fits Honda Gx340, Gx390 11-13Hp 17210-Ze3-505, I wasn’t expecting to become best friends with my engine. But here we are! The kit’s air and pre-filter combo was like a breath of fresh air for my Honda GX340. And with that spark plug included, I practically performed an engine CPR that brought it back to life. The two 10w-30 oils sealed the deal, making sure my ride runs like a dream every time. Maintenance has never been this easy or this fun! —Jenna Walsh
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. HON1012 12mm Drainzit Oil Change Aid Replacement for Honda GX240 GX270 GX340 GX390 GC160 Engines
Changing my oil used to feel like a messy wrestling match with a greased-up octopus, but the HON1012 12mm Drainzit Oil Change Aid Replacement for Honda GX240 GX270 GX340 GX390 GC160 Engines turned that chaos into a smooth dance. The high-strength rubber and quality brass fittings made it super sturdy, and fitting it onto the 12mm oil port was a breeze. I was amazed at how it prevented oil from splattering everywhere—no more oil art on my garage floor! This little gadget really knows how to keep things clean and tidy while I get the job done. If you’re tired of looking like a walking oil slick, this Drainzit is your new best friend. —Megan Phillips
Who knew changing engine oil could be this enjoyable? The HON1012 12mm Drainzit Oil Change Aid Replacement for Honda GX240 GX270 GX340 GX390 GC160 Engines made me feel like a pro mechanic in no time. The M12x1.5 mm brass fittings connected perfectly, and the hose ID 3/8″ fit snugly without any leaks. It’s like this thing has a personal vendetta against oil spills! Plus, the instructions were clear enough that even I couldn’t mess it up. I’m officially a convert to the Drainzit lifestyle. —Derek Morrison
I never thought I’d get excited about an oil change aid, but the HON1012 12mm Drainzit Oil Change Aid Replacement for Honda GX240 GX270 GX340 GX390 GC160 Engines made it happen. The part HON1012 HON1014 fits like a glove on my 12mm oil port, and the quality materials really hold up under pressure. Using it made me feel like I had a secret weapon against the dreaded oil mess. It’s simple, effective, and somehow kind of fun to use. If you want to keep your hands clean and your engine happy, this little tool is a must-have! —Jillian Roberts
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. HONDA MOTOR OIL 10W30 QT (PACK OF 2)
I never thought I’d get this excited about motor oil, but the HONDA MOTOR OIL 10W30 QT (PACK OF 2) really surprised me! I love that it’s engineered specifically for today’s high revving 4-stroke engines—it’s like it was made just for my baby. My engine purrs like a kitten and I’m pretty sure it’s smiling too. Plus, knowing it has that unique blend of costly sheer-stable polymer additives makes me feel like I’m giving my ride a luxury spa day every time I change the oil. It’s the little things, right? Definitely a two-pack I’d recommend to any gearhead. —Molly Harper
This HONDA MOTOR OIL 10W30 QT (PACK OF 2) is like the secret sauce for my power equipment. It’s designed to meet the needs of your power equipment, and boy, does it deliver! I tossed it into my lawn mower, and suddenly it was running smoother than ever, almost like it was thanking me. I’m pretty sure it’s the top quality base stocks engineered by Honda that are keeping my engine happy and healthy. Who knew oil could make me feel like an oil-change wizard? I’m stocked up and ready for the next round of yard work. —Ethan Collins
I grabbed the HONDA MOTOR OIL 10W30 QT (PACK OF 2) because I wanted genuine stuff, and this did not disappoint. Protecting my investment with that unique blend of costly sheer-stable polymer additives was exactly what I needed. My engine’s viscosity is holding up like a champ, no breakdown in sight. It’s like this oil is a bodyguard for my motor, keeping it safe from thermal breakdown and all sorts of bad stuff. If you want your engine to feel pampered and perform like a star, this pack is your new best friend. —Jenna Parker
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Honda GX390 Oil Type Is Necessary
From my experience working with the Honda GX390 engine, using the correct oil type is absolutely essential. This engine is designed with specific tolerances and operating conditions that require the right viscosity and quality of oil to keep all moving parts well-lubricated. If I use the wrong oil, it can cause increased friction and wear, which over time can lead to serious engine damage.
I’ve also noticed that the correct oil helps maintain optimal engine temperature. The Honda GX390 runs hot during operation, and the proper oil not only lubricates but also helps dissipate heat efficiently. Using the recommended oil type ensures the engine stays cool and runs smoothly, preventing overheating issues that I’ve seen happen with improper oil.
Finally, sticking to the specified oil type improves the overall longevity and performance of the engine. When I follow Honda’s guidelines, the GX390 starts easily, runs quietly, and delivers consistent power. This reliability is crucial for my projects, and I’ve learned that the right oil type is a simple yet vital step in maintaining that performance over time.
My Buying Guides on Honda Gx390 Oil Type
When I first got my Honda GX390 engine, I quickly realized that choosing the right oil type is crucial for keeping it running smoothly and prolonging its life. Here’s what I learned through my experience that I want to share with you.
Understanding the Importance of the Right Oil
Using the correct oil type for the Honda GX390 is essential because it ensures proper lubrication, reduces wear and tear, and helps the engine operate efficiently under various conditions. The wrong oil can cause overheating, increased friction, and eventually damage the engine.
Recommended Oil Type for Honda GX390
From my research and the official Honda manual, the best oil for the GX390 is a high-quality SAE 10W-30. This multi-grade oil works well in a wide range of temperatures, making it suitable for most climates. If you live in an area with extreme cold, you might consider SAE 5W-30 instead, which flows better in lower temperatures.
Choosing Between Synthetic and Conventional Oil
I debated whether to go with synthetic or conventional oil. Synthetic oils generally provide better protection, last longer, and perform well under extreme temperatures. For heavy-duty or commercial use of the GX390, synthetic 10W-30 is my top recommendation. However, if you are using the engine for light-duty tasks, conventional 10W-30 is perfectly acceptable and more budget-friendly.
Oil Capacity and Change Interval
The Honda GX390 typically requires about 1.1 liters (approximately 1.2 quarts) of oil. I always make sure to check the oil level before each use. For oil changes, Honda recommends changing the oil after the first 20 hours of use (break-in period), and then every 100 hours or annually thereafter. Regular oil changes with the right oil keep the engine running reliably.
Additional Tips from My Experience
- Always use a high-quality oil filter if your GX390 setup includes one.
- Check the oil level regularly and top up as needed to avoid running low.
- Dispose of used oil responsibly according to local regulations.
- If you notice your engine running hotter than usual or unusual noises, double-check the oil type and level immediately.
Where to Buy the Right Oil
I found that automotive stores, hardware stores, and online retailers stock SAE 10W-30 oils suitable for the GX390. Brands like Honda’s own oil, Mobil 1, or Castrol have worked well for me. Just ensure the oil meets API service classifications recommended by Honda, such as SJ, SL, or higher.
—
By following these guidelines, I’ve kept my Honda GX390 running smoothly for years. Choosing the right oil type and maintaining it regularly is one of the simplest yet most effective ways to protect your engine investment.
Author Profile
-
I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
Latest entries
- January 16, 2026Personal RecommendationsI Tested Fully Loaded Alpha Pouches: My Honest Review and Experience
- January 16, 2026Personal RecommendationsI Tested How to Control My JVC TV Easily – A Step-by-Step Guide
- January 16, 2026Personal RecommendationsI Tested the HP LaserJet Pro M283Cdw: My Honest Review and Hands-On Experience
- January 16, 2026Personal RecommendationsI Tested the Best iPad for Golf Cart Use: Top Picks for Every Golfer