John Deere Original Equipment 32 oz. SAE 30 Oil - TY26790

What It Is

This is John Deere’s OEM 32 oz. SAE 30 engine oil (part number TY26790), designed for four-cycle lawn mower engines. It’s a straight-weight, high-temperature oil meant for warmer-weather operation in push mowers, riding mowers, and zero-turn mowers.

Fitment & Compatibility

• Check your engine type: Only use in four-cycle (4-stroke) engines. Do not use in two-cycle engines or in engines requiring multi-viscosity oil (e.g., 10W-30).
• Check your owner’s manual: John Deere recommends SAE 30 for temperatures consistently above 40°F (4°C). If you mow in cooler weather, you need a different viscosity (like 10W-30).
• OEM vs aftermarket: This is John Deere factory oil. It meets API service classification SJ or higher. Any oil with the same viscosity and API rating will work, but OEM guarantees correct formulation for Deere engines.
• Volume: 32 oz. (1 quart). Most push mowers take 18–20 oz., while larger riding mowers may need 2 quarts. Verify your engine’s oil capacity before buying.

Key Things to Know

• Quality: Genuine John Deere oil, rated 4.8/5 stars. Formulated for their engines, with detergents and anti-wear additives suited for air-cooled small engines.
• Installation difficulty: Trivial. Remove dipstick, drain old oil, refill to full mark. No special tools needed.
• Common gotcha: Don’t overfill. Adding the full 32 oz. to a push mower that takes 18 oz. will cause foaming, leaks, and possible engine damage. Measure capacity first.
• Storage: Unused oil has a shelf life of about 5 years if sealed. Keep in a cool, dry place away from extreme heat.

Should You Buy It

If you own a John Deere mower and mow in warm weather (over 40°F), this is a safe, simple choice—especially if you want OEM assurance and don’t want to second-guess viscosity. For non-Deere engines or cold-weather use, look elsewhere.