Honda recommends SAE 10W-30 for general use in its generators, in a 4-stroke detergent oil rated API SJ or later. The popular EU2200i holds 14 ounces (0.44 liter). New Honda generators ship without oil, so you have to fill them before the first start. Change the oil after the first month or 20 hours, then every 6 months or 100 hours, according to the EU2200i manual.
What oil does a Honda generator use?
The Honda EU2200i owner’s manual says:
- Type: 4-stroke automotive detergent oil
- Service rating: API SJ or later (or equivalent). Look for the API “donut” on the bottle.
- Viscosity: SAE 10W-30 for general use. Other grades on the manual’s temperature chart can be used when your average temperature is in their range.
Other Honda generators, from the EU1000i to the larger EU and EB models, use the same type of oil. Oil capacity changes by engine, so check the manual for your model.
Honda generator oil at a glance
| Item | Honda EU2200i |
|---|---|
| Recommended oil | SAE 10W-30, API SJ or later |
| Oil capacity | 14 oz (0.44 L) |
| Comes with oil? | No. Fill before first use. |
| First oil change | 1 month or 20 hours |
| After that | Every 6 months or 100 hours |
Change more often if you run the generator in dusty conditions or under heavy load for long periods.
How to check and add oil
- Set the generator on level ground with the engine off and cool.
- Remove the maintenance cover and the oil filler cap.
- On the EU2200i, the oil should reach the edge of the filler opening. Other models use a dipstick. Follow your manual.
- Add oil slowly with a funnel or the oil bottle’s spout, and don’t overfill. Too much oil can foam and smoke.
- Reinstall the cap and cover.
Honda generators have an oil alert system that shuts the engine down when oil runs low. If yours won’t start or stops after a few seconds, check the oil first. Don’t disable the sensor. Here’s why: bypassing a low oil sensor.
Can you use synthetic oil in a Honda generator?
Yes, as long as it meets the viscosity and API rating in your manual. Synthetic 10W-30 or 5W-30 flows better in cold weather. Many owners stick with conventional oil for the first change, while the engine breaks in, then switch.
Can you use 5W-30?
Yes, in cold weather. Honda’s temperature chart allows other viscosities when the average temperature fits their range, and a 5W oil flows more easily for cold starts. If you live somewhere hot and run the generator hard, stick with 10W-30.
Related guides: How to Break In a New Generator.
FAQ
Does a new Honda generator come with oil?
No. It’s shipped dry, so you need to add oil before starting it.
How much oil does a Honda EU2200i take?
14 ounces (0.44 liter). That’s less than half a quart, so you’ll have oil left over from a 1-quart bottle.
How often should I change the oil in my Honda generator?
For the EU2200i, after the first month or 20 hours, then every 6 months or 100 hours, whichever comes first.
Can I use car oil in my Honda generator?
Yes. Honda recommends 4-stroke automotive detergent oil, the same kind sold for cars, as long as it’s the right viscosity and API rating.
Have another brand? See the oil guides for Generac, Champion and Predator generators, or our general guide to generator oil.