Stens 770-030 4-Cycle Engine Oil SAE 30

What It Is

Stens 770-030 is a high-quality SAE 30 4-cycle engine oil designed for small engines in lawn mowers, tractors, and other outdoor power equipment. It’s a straight-weight oil ideal for warm-weather operation (above 40°F) and general-purpose use in air-cooled engines.

Fitment & Compatibility

• Engine type: Only for 4-cycle engines (not for 2-cycle or mixed-fuel engines).
• Viscosity: SAE 30 – best for temperatures above 40°F; not recommended for cold weather or snow blowers.
• OEM cross-reference: Works as a replacement for OEM oils from Briggs & Stratton, Tecumseh, Kohler, Kawasaki, Honda, and others that specify SAE 30.
• Capacity: Check your engine’s oil capacity (typically 18–20 oz for push mowers, up to 48 oz for larger tractors). This bottle is 32 oz – enough for most push mowers with leftover.
• Certification: Meets API service classification SF, SG, SH, SJ, or higher – compatible with older engines but may not meet newer emissions-related specs (e.g., for Kawasaki FR series). Always verify your engine manual’s oil recommendation.

Key Things to Know

• Quality: Stens is a reputable aftermarket brand used by many small-engine repair shops; oil meets or exceeds OEM performance standards.
• Installation difficulty: Easy – simply drain old oil, replace filter (if equipped), and refill. No special tools needed.
• Common gotcha: Do not use in engines requiring synthetic, 10W-30, or multi-viscosity oil. SAE 30 is thick when cold – avoid use below 40°F.
• Storage: Keep sealed and store in a cool, dry place; shelf life is several years if unopened.

Should You Buy It

If you have a 4-cycle mower or small engine that calls for SAE 30, and you operate in warm weather, this is a solid, budget-friendly choice. It won’t suit modern engines requiring synthetic or multi-grade oil, but for classic Briggs, Tecumseh, or Honda engines, it’s reliable and widely available.