Stens New 4-Cycle Engine Oil for Universal Products SAE30, 770-030

What It Is

Stens 770-030 is a 1-gallon bottle of SAE 30 4-cycle engine oil designed for small engines in lawn mowers, tractors, and other outdoor power equipment. It’s a straight-weight, high-detergent oil meant for warmer weather operation (above 40°F).

Fitment & Compatibility

• Engine types: Fits most 4-cycle engines from Briggs & Stratton, Kohler, Honda, Kawasaki, Tecumseh, and others that specify SAE 30 viscosity. Not for 2-cycle engines.
• OEM vs aftermarket: Stens is a well-known aftermarket brand; this meets or exceeds API service classifications (typically SJ, SL, or SM). No OEM-specific licensing required—SAE 30 is a universal spec.
• Capacity check: One gallon (128 oz) is a bulk size. Typical push mowers take 15–20 oz; riders take 48–64 oz. Use the engine’s dipstick or manual for exact fill volume.
• Temperature note: SAE 30 is too thick for cold weather (below 40°F). If you mow in cooler climates, switch to SAE 10W-30 or 5W-30.

Key Things to Know

• Quality: Stens is a respected aftermarket brand in the power equipment industry. This oil is comparable to OEM oils but costs less per gallon.
• Installation: No special skill needed. Drain warm oil, replace filter (if equipped), fill to dipstick mark. Overfilling can cause engine damage.
• Common gotcha: This is straight SAE 30, not multi-viscosity. Using it in cold weather will make starting difficult and increase engine wear. Check your engine manual for recommended viscosity.
• Storage: Keep sealed and away from moisture. Shelf life is several years if stored properly.

Should You Buy It

Buy this if you have multiple 4-cycle engines (mowers, generators, tillers) that require SAE 30 and you want a cost-effective, high-quality bulk option. It’s overkill for a single push mower—a quart bottle is cheaper—but ideal for fleet owners or DIYers with several machines. Skip it if you need multi-viscosity oil or operate in cold climates.