Is this for gasoline engines?

This is for Onan gas generators

Can i use this in a wood chipper with a 4 cycle engine?

If your wood chipper requires 15w 40 weight oil this would most likely meet the motors requirements.

It will work for 2022 Ram 2500 diesel?

Yes. It makes any diesel fuel become premium diesel. The 2022 Cummins may not NEED it as much as an older high mileage diesel, but will still get benefit from it

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Onan OnaMax SAE 15W-40 Engine Oil, 32 oz.

Product ID: 281393836

Details

Brand
Cummins
Liquid volume
1 Liters
Package information
Bottle
Vehicle service type
Car
Viscosity
15w-40

🔥High-temp oxidation resistance

⚙️15W-40 viscosity for robust engine protection

🛢️32 oz premium factory-tested oil

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¥10160

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Keep your generator running like a pro with OnaMax precision oil!

TRUSTED BY PROFESSIONALS - 4.8-star rating from nearly 1,000 users confirms reliability
HIGH TEMPERATURE STABILITY - Minimizes oil consumption and viscosity increase during intense use
PRECISION VISCOSITY CONTROL - 15W-40 grade ensures optimal flow and protection under stress
EXCLUSIVE OEM RECOMMENDATION - Specifically formulated and shipped with Onan generators
ENGINEERED FOR PEAK PERFORMANCE - Factory-tested to reduce wear and extend engine life

Onan OnaMax SAE 15W-40 Engine Oil is a premium, conventional motor oil designed specifically for Onan generators. It offers superior protection against high-temperature oxidation and viscosity changes, reducing engine wear and oil consumption. Factory-tested and recommended by Cummins, this 32 oz bottle ensures your generator performs reliably under demanding conditions.

Specifications

ASIN	B00278MET8
Automotive Fit Type	Universal Fit
Best Sellers Rank	#78,828 in Automotive ( See Top 100 in Automotive ) #810 in Automotive Oils
Brand	Cummins
Brand Name	Cummins
Compatible with Vehicle Type	Car
Container Type	Bottle
Customer Reviews	4.8 out of 5 stars 1,005 Reviews
Global Trade Identification Number	00690781000704
Included Components	Oil
Item Type Name	Oil
Item Weight	1.92 Pounds
Liquid Volume	1 Liters
Liquid volume	1 Liters
Manufacturer	Cummins
Manufacturer Part Number	326-5336
Model Number	326-5336
Package information	Bottle
SAE J300 Viscosity Grade	15W-40
Size	32 oz
UPC	690781000704
Unit Count	32 Fluid Ounces
Vehicle service type	Car
Viscosity Level	Medium to High

Reviews

J**N

The Right Oil for My Onan RV Generator – Won't Use Anything Else

12.04.2026

F**R

Oil

5.04.2026

J**E

Only use ONAN products on ONAN generators!

5.09.2025

R**S

Recommend by Onan

23.03.2026

C**S

Good

2.04.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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