Home / For Consumers / Boats & Recreational Marine

For consumers · Marine

Help marine engines run cleaner and more efficiently.

MaxDx1 supports non-aviation recreational marine engines using gasoline or diesel, with dosing based on the amount of fuel treated.

Why it fits

For supported gasoline and diesel marine engines.

Marine use should be matched to the engine, fuel type, tank volume, and operating pattern. Heavy residual fuel and open-flame applications may require different products.

  • Suitable for supported recreational marine engines
  • Helps address deposits, smoke, friction, and fuel use
  • Aircraft and aviation-fuel applications are excluded from current promotion
Boats & Recreational Marine

What MaxDx1 supports

Performance benefits, stated responsibly.

Results vary by engine, fuel, duty cycle, baseline condition, dose, and test method.

Fuel efficiency

Helps improve fuel economy when evaluated in the actual operating environment.

Lubricity

Helps reduce friction and wear across supported fuel and oil applications.

Cleaner operation

Helps keep injectors and fuel systems clean while reducing smoke and deposits.

Engine performance

Helps restore performance affected by friction or deposits.

Practical guidance

Use the correct dose. Measure the real result.

Measure MaxDx1 against the actual fuel or oil volume. Do not estimate from container size when the tank or crankcase is only partly filled.

First tank only2 oz / 10 gal

Initial fuel treatment

Use two fluid ounces per 10 U.S. gallons of gasoline or diesel for the first tank only.

Every fill after1 oz / 10 gal

Normal fuel dose

After the first treatment, use one fluid ounce per 10 U.S. gallons at every fill.

Every oil change1 oz / quart

Engine-oil treatment

Use one fluid ounce per quart of engine oil at every oil change.

Use only in supported non-aviation applications. Results vary by engine, fuel, condition, duty cycle, dose, and test method.

Marine application inquiry

Tell us about your boat, engine, and fuel system.

We will point you to the approved dosing and evidence relevant to the application.