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AMSOIL HP MARINE Synthetic 2-Cycle Oil

AMSOIL hp Injector is now AMSOIL HP Marine.

Same premium formulation, new look.


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AMSOIL hp MARINE Synthetic 2-Cycle Oil (HPM)







AMSOIL MARINE - Product Code Pkg./Size

HPMQT-EA / Quart Bottle

HPMQT-CA / Quart Bottles (case of 12)

HPM1G-EA / Gallon Bottle

HPM1G-CA / Gallon Bottles (case of 4)

HPM16-EA / 16-Gallon Keg

HPM30-EA / 30-Gallon Drum

HPM55-EA / 55-Gallon Drum

HPM27-EA / 275-Gallon Tote


Buy Amsoil HP MARINE 2 Stroke Oil





2-Cycle Oil Recomendations Chart


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High-quality motor oil is critical for maximum performance in modern two-cycle marine motors. Direct fuel injection (DFI) improves combustion efficiency, delivering the extra power enthusiasts want, while leaner gas-to-oil ratios provide the reduced exhaust emissions the government mandates. The leaner ratio leaves less oil to lubricate and protect these hotter, more powerful motors, which invites deposits and wear that threaten engine performance and life. HP Marine is proven to excel in these harsh challenges. It controls performance-robbing friction, heat and wear, yet produces low smoke and has low aquatic toxicity properties. It's an oil as advanced as the engines it protects.


Outstanding Wear Protection

The elevated heat and friction of modern two-cycle marine motors can exceed the film strength of inferior oils, increasing the likelihood of scuffing and wear. HP Marine's exclusive synthetic formulation provides increased lubricity for reduced wear during normal and lean-mix operation (see field study results). In 534 hours of field testing, HP Marine completely prevented piston skirt and cylinder bore scuffing, demonstrating its superior lubricity and ability to reduce friction between moving parts. It maintains a strong lubricating film even in lean-mix, severe-service conditions, helping marine engines achieve maximum life.


Excellent Deposit Control

HP Marine is formulated with MAXDOSE™, a system of advanced additives for "super-clean" operation. It helps prevent deposits that lead to poor performance. In field testing, HP Marine inhibited ring deposits that can cause ring sticking and ring jacking (carbon build-up behind the ring, forcing it outward), a phenomenon that occurs in modern DFI outboard motors. It also virtually eliminated exhaust port deposits for reliable, efficient operation.



AMSOIL HP Marine™ is recommended for use in all two-cycle outboard motors including, but not limited to, Johnson® and Evinrude® FICHT® & E-TEC™ (replaces XD100™ 2-Cycle Oil); Mercury® EFI & Optimax®; Yamaha®; Nissan® and Tohatsu® TLDI®; Suzuki®; Mariner® and Force®. It is also recommended for use in all two-cycle personal watercraft (PWC). Use as injection oil or as 50:1 pre-mix (2.6 oz. per U.S. gallon of gas) where NMMA TC-W3 or API TC oils are specified. Compatible with mineral and synthetic TC-W3-type two-cycle oils; however, mixing two-cycle oils should be minimized.


Proven in Marine E-TEC Field Study

AMSOIL HP Marine was installed in a 250-hp Evinrude E-TEC engine powering a heavy-duty marine rescue vessel. Following a 28-hour break-in period at the normal oil setting, the engine was programmed to its factory-lean setting and operated for 506 hours prior to disassembly. An ASTM calibrated rater examined and awarded each component either a merit rating on a scale of 0 to 10 (with 10 representing no distress) or a percentage rating (with 0 percent representing no distress). Results prove HP Marine provided exceptional wear protection and deposit control. For complete study results, visit


2-Cycle Oil Recomendations Chart




Amsoil hp MARINE Synthetic 2-Cycle Oil


Kinematic Viscosity @ 100°C, cSt (ASTM D-445)= 8.5

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)= 46.8

Viscosity Index (ASTM D-2270)= 160

Pour Point °C (°F) (ASTM D-97)= -46 (-51)

Flash Point °C (°F) (ASTM D-92)= 86 (187)

Fire Point °C (°F) (ASTM D-92)= 86 (187)

ASTM Brookfield Viscosity @ -40°C (°F), cP 14025 NMMA TC-W3® Rust Test Pass Jaso M 342-92 Smoke Test (FD). Pass

TC-W3 Lubricity Test (ASTM D 4863) Pass

OECD - Guideline 203, Fish Acute Toxicity Test . 100% Survival Rate

OECD - Guideline 202, Daphnia Acute Immobilization Test 100% Survival Rate


DANGER: harmful or fatal if swallowed. Contains synthetic lubricant and petroleum distillates. If swallowed do not induce vomiting. Contact a physician immediately.


Keep away from fire, heat and open flame. Use with adequate ventilation. Avoid frequent or prolonged skin contact. Flush eyes with water for 15 minutes in case of contact. KEEP OUT OF REACH OF CHILDREN.


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"While the competition has been formulating their oils down to a price, we have been formulating ours up to the highest performance standards."
--Al Amatuzio--President and CEO, AMSOIL INC.