Stihl HP Ultra 2-Cycle Engine Oil — 1 Gallon (128 oz), Fully Synthetic High-Performance

STIHL HP Ultra 2-cycle engine oil is a fully synthetic, high-performance lubricant in a 1-gallon jug designed to protect and clean high-speed 2-stroke engines.

Engineered for professional and demanding homeowner use, this premium 128-ounce formula offers advanced lubrication and cleaning properties for chain saws, trimmers, blowers and other 2-stroke equipment. The synthetic base reduces deposits and wear while formulated additives improve fuel stability and combustion. It’s also formulated to biodegrade rapidly, making it a sensible choice where environmental impact matters.

How does this oil protect my 2-stroke engine?

HP Ultra delivers a combination of high-temperature stability and detergents that minimize carbon buildup, reduce friction, and keep internal parts cleaner over time. That cleaner combustion and stronger film strength help extend component life when mixed correctly with fuel.

• Fully synthetic base for superior lubrication under heat and load
• Detergent additives reduce gum and carbon deposits
• Improved film strength to limit metal-to-metal wear
• Formulated for modern high-revving 2-stroke designs

Will this oil work with my mixing ratio and equipment?

The 1-gallon jug contains enough concentrate to mix at common ratios used by manufacturers; specifically, one gallon of HP Ultra mixes into about 50 gallons of 50:1 fuel. It’s suitable for chain saws, trimmers, blowers and other two-stroke power tools that call for high-quality synthetic 2-cycle oil.

• One gallon yields fuel for approximately 50 gallons at 50:1 mix
• Compatible with most modern 2-stroke handheld equipment
• Use manufacturer-recommended mix ratios for best results
• Contains fuel stabilizers to improve stored fuel performance

Is this oil environmentally responsible?

HP Ultra is designed to biodegrade significantly faster than conventional mineral oils: lab data shows substantial degradation within weeks under appropriate conditions. This reduced persistence can lower long-term environmental loading where accidental releases occur or where small machines operate in sensitive areas.

• Fully synthetic formulation formulated for faster biodegradation
• Documented high rate of breakdown under biodegradation testing
• Lower potential for long-term soil and water persistence compared with conventional oils

What additional benefits or assurances does STIHL offer?

STIHL backs this oil as their premium 2-cycle lubricant, and when used as directed it supports equipment performance and reliability. STIHL has a warranty program linked to using their approved oils — check current terms for details and eligibility requirements.

• STIHL-branded premium oil tailored for their engines and other brands
• Contains detergents and stabilizers to maintain fuel integrity
• 128-ounce jug for cost-effective multi-machine refills

Who is this for? If you operate high-revving 2-stroke outdoor power equipment—professional arborists, landscapers, rental operators, or serious homeowners—HP Ultra supplies a durable, low-deposit synthetic lubricant in a convenient gallon container. Choose this oil if you want longer-lasting cleaner operation, easier maintenance, and a formula with improved biodegradation versus standard 2-cycle oils. Always follow your equipment manufacturer’s mix ratio and maintenance guidelines when using any fuel-oil blend.