AMSOIL Cetane Boost Diesel AdditiveAMSOIL Cetane Boost is a concentrated diesel additive designed for a maximum cetane upgrade. Can raise cetane level by up to seven points. Improves combustion, mileage, performance and more in any diesel application.

AMSOIL Cetane Boost package sizes include:
16-oz. (473 ml) Bottle
5-US Gallon Pail
55- US Gallon Drum


wholesale price

For emergency freeze-ups, keep AMSOIL Diesel Recovery Fuel Treatment on hand.

What is Cetane?

The cetane value assigned to a diesel fuel is based the time interval between when fuel is first injected into the cylinder and when actual combustion takes place. The higher the cetane number, the faster combustion occurs after fuel is injected into the cylinder. A diesel fuel with higher cetane offers more effective combustion. The minimum allowable cetane number in North American diesel is 40, but most fuel falls between 41 and 45. Cetane can vary widely between fuel suppliers and geographical regions. For example, due to California’s strict emissions laws, diesel fuel in that state must have a minimum cetane value of 53. A cetane number in the 50’s is quite effective, so cetane boost additives likely are not necessary (for the most part) in that region. As cetane numbers enter the mid-50’s, a law of diminishing returns takes effect as there are no benefits to boosting cetane much beyond that point. Where cetane boosts are most valuable is when they can boost the cetane number beyond the early to mid-40’s.

The following video offers a concise explanation of how the cetane level of diesel fuel impacts combustion.

Should You Use a Cetane Boost?

As you cannot assume that all fuel carries a healthy cetane number and as most diesel fuel falls into the early to mid-40 range throughout most of Canada and the US, it can be well worth it to experiment with cetane additives. As a product like AMSOIL Cetane Boost can improve the cetane number by a significant margin, the operational and fuel economy benefits can definitely be very cost effective.

Features and Benefits of AMSOIL Cetane Boost Diesel Additive

  • Potent formula boosts cetane number up to seven points.
  • Improves combustion for improved performance
  • Improves fuel mileage
  • Smoother operation throughout the RPM range
  • Improves cold starting
  • Reduces exhaust smoke

Suitable Applications for AMSOIL Cetane Boost Diesel Additive

This product is suitable for any type of diesel engine including those used in transport, agricultural, industrial, marine or automotive applications. Suitable for treatment of all diesel fuel types including biodiesel. Will not harm exhaust treatment devices or emissions sensors.

Mixing Rate for AMSOIL Cetane Boost Diesel Additive

For adequate mixing, pour the correct amount of AMSOIL Cetane Boost Diesel Additive into fuel tank before adding diesel.

Metric Mix Rates

For 3 Cetane Point Increase

  • .79 ml per litre of fuel
  • Full 473 ml ounce bottle format treats 600 litres

For 7 Cetane Point Increase

  • 1.57 ml per litre of fuel
  • Full 473 ml ounce bottle format treats 300 litres

US Gallon Mix Rate

For 3 Cetane Point Increase

  • 1 US ounce per 10 US gallons of fuel
  • Full 16 ounce bottle format treats 160 US gallons

For 7 Cetane Point Increase

  • 2 US ounces per 10 US gallons of fuel
  • Full 16 ounce bottle format treats 80 US gallons