--- product_id: 10622781 title: "Onan OnaMax SAE 15W-40 Engine Oil, 32 oz." brand: "cummins" price: "AR$82943" currency: ARS in_stock: true reviews_count: 8 category: "Cummins" url: https://www.desertcart.com.ar/products/10622781-onan-onamax-sae-15w-40-engine-oil-32-oz store_origin: AR region: Argentina --- # Formulated to reduce oil consumption & engine wear 15W-40 viscosity for high-temp stability Convenient 32 oz bottle for easy maintenance Onan OnaMax SAE 15W-40 Engine Oil, 32 oz. **Brand:** cummins **Price:** AR$82943 **Availability:** ✅ In Stock ## Summary > 🛠️ Keep your Onan generator running like a pro—because your power deserves precision. ## Quick Answers - **What is this?** Onan OnaMax SAE 15W-40 Engine Oil, 32 oz. by cummins - **How much does it cost?** AR$82943 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/10622781-onan-onamax-sae-15w-40-engine-oil-32-oz) ## Best For - cummins enthusiasts ## Why This Product - Trusted cummins brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Brand Quality:** Cummins-backed product with a 4.8-star rating from over 1,000 users—join the satisfied pros. - • **Reduced Oil Consumption:** Advanced formulation minimizes oil oxidation, saving you money and hassle. - • **Heat-Resistant Viscosity:** 15W-40 grade ensures optimal performance under high temperature and heavy load conditions. - • **Precision Engine Protection:** Specifically engineered for Onan generators to maximize engine life and reliability. - • **Perfect Size for Maintenance:** 32 oz bottle designed for hassle-free oil changes, keeping your generator ready for every adventure. ## Overview Onan OnaMax SAE 15W-40 Engine Oil is a conventional, non-synthetic oil specially formulated by Cummins to reduce engine wear and oil consumption in Onan generators. Packaged in a convenient 32 oz bottle, it offers high-temperature stability and reliable performance, making it the go-to choice for RV owners and professionals who demand consistent generator power and longevity. ## Description Onan OnaMax SAE 15W-40 Engine Oil, 32 oz. Review: The Right Oil for My Onan RV Generator – Won't Use Anything Else - When it comes to keeping my Onan RV generator running at its best, I trust OnaMax SAE 15W-40 and nothing else. Using the manufacturer-recommended oil just makes sense—it's specifically formulated for Onan generators and gives the peace of mind that comes with knowing you're putting the right product in a piece of equipment you depend on. The 15W-40 viscosity handles the heat and demands of generator use well, and after oil changes with this product the generator starts reliably and runs smoothly without hesitation. For RV use where the generator gets regular workouts powering appliances, AC units, and other loads, using the correct oil is one of the simplest and most important things you can do to protect your investment and extend the life of the engine. If you own an Onan RV generator and want to do right by it, skip the guesswork and use the oil that's made for it. This is a no-brainer purchase that I'll keep on my regular maintenance supply list. Review: Oil - Great quality / price value ## Features - Conventional non-synthetic oil - Specially formulated to reduce consumption and engine wear due to high temp oil oxidation - 32-oz. bottle ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00278MET8 | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #4,054 in Automotive ( See Top 100 in Automotive ) #75 in Motor Oils | | Brand | Cummins | | Brand Name | Cummins | | Compatible with Vehicle Type | Generator | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 1,071 Reviews | | Global Trade Identification Number | 00690781000704 | | Included Components | Oil | | Item Type Name | Oil | | Item Weight | 1.9 pounds | | Liquid Volume | 1 liters | | Manufacturer | Cummins | | Manufacturer Part Number | 326-5336 | | Model Number | 326-5336 | | Number of Packs | 1 | | Package Information | Bottle | | SAE J300 Viscosity Grade | 15W-40 | | Size | 32 oz | | UPC | 690781000704 | | Unit Count | 32 Fluid Ounces | | Vehicle Service Type | Generator | | Viscosity Level | Medium to High | ## Product Details - **Brand:** Cummins - **Liquid Volume:** 1 Liters - **Package Information:** Bottle - **SAE J300 Viscosity Grade:** 15W-40 - **Vehicle Service Type:** Generator ## Images ![Onan OnaMax SAE 15W-40 Engine Oil, 32 oz. - Image 1](https://m.media-amazon.com/images/I/61ica2HVebL.jpg) ## Questions & Answers **Q: Is this for gasoline engines?** A: This is for Onan gas generators **Q: Can i use this in a wood chipper with a 4 cycle engine?** A: If your wood chipper requires 15w 40 weight oil this would most likely meet the motors requirements. **Q: Why is the price 2x srp?** A: Yes **Q: It will work for 2022 Ram 2500 diesel?** A: 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ The Right Oil for My Onan RV Generator – Won't Use Anything Else *by J***N on April 12, 2026* When it comes to keeping my Onan RV generator running at its best, I trust OnaMax SAE 15W-40 and nothing else. Using the manufacturer-recommended oil just makes sense—it's specifically formulated for Onan generators and gives the peace of mind that comes with knowing you're putting the right product in a piece of equipment you depend on. The 15W-40 viscosity handles the heat and demands of generator use well, and after oil changes with this product the generator starts reliably and runs smoothly without hesitation. For RV use where the generator gets regular workouts powering appliances, AC units, and other loads, using the correct oil is one of the simplest and most important things you can do to protect your investment and extend the life of the engine. If you own an Onan RV generator and want to do right by it, skip the guesswork and use the oil that's made for it. This is a no-brainer purchase that I'll keep on my regular maintenance supply list. ### ⭐⭐⭐⭐⭐ Oil *by F***R on April 5, 2026* Great quality / price value ### ⭐⭐⭐⭐⭐ Use the correct oil for its intended use. *by M***Y on July 23, 2026* Not all oil is recommended for air cooled engines. So I decided to run the oil that is recommended by the manufacturer. So far all working very well. ## Frequently Bought Together - CUMMINS NW Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart - CUMMINS NW Cummins Onan 122-0836 Oil Filter (Packaging May Vary) - CUMMINS NW Cummins 1403116 Onan Air Filter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/10622781-onan-onamax-sae-15w-40-engine-oil-32-oz](https://www.desertcart.com.ar/products/10622781-onan-onamax-sae-15w-40-engine-oil-32-oz) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-14*