K&N Motor Oil: 5W-30 Synthetic Engine Oil: Premium Protection, High Mileage, 1 Quart

What It Is

K&N 5W-30 synthetic motor oil is a high-performance lubricant designed for small engines in lawn mowers, tractors, and zero-turn mowers that require 5W-30 viscosity. It’s formulated for high-mileage engines (over 100 hours) to reduce oil consumption and wear.

Fitment & Compatibility

Before buying, check your equipment’s owner’s manual for the recommended oil viscosity (5W-30 is common in many Briggs & Stratton, Kohler, Kawasaki, and Honda engines). This oil is not engine-specific—it fits any 4-stroke small engine that calls for 5W-30. It does not require OEM approval; aftermarket synthetics are fine if the viscosity matches. Measure your crankcase capacity: most push mowers take 15–20 oz, riders/tractors take 48–64 oz. One quart (32 oz) covers one oil change for most small engines. Do not use in 2-stroke engines.

Key Things to Know

• Synthetic benefits: Better high-heat protection and longer change intervals than conventional oil—ideal for mowers used in hot conditions or heavy cutting.
• Installation difficulty: Easy—just drain old oil, replace filter (if equipped), and refill to the dipstick full mark. No special tools needed.
• High-mileage formula: Contains seal conditioners to reduce leaks in older engines; not necessary for new or low-hour mowers.
• Common gotcha: Overfilling is easy—always check the dipstick after adding oil, and never exceed the full mark. Use a funnel to avoid spills.

Should You Buy It

Buy this oil if you have a 4-stroke lawn mower that requires 5W-30, especially a high-mileage engine or one used in hot conditions. It’s a premium upgrade over conventional oil, but if your mower is new and you follow standard change intervals, a cheaper conventional 5W-30 will also work fine.