The 64 ounce and 80 ounce bottles both treat 250 gallons. The 64 ounce bottle is slightly more concentrated to allow it to treat the same amount of fuel as the 80 ounce bottle. As long as you follow the directions on the label you are getting the exact same amount of active ingredients added to your fuel, and it will perform exactly the same.

Yes, all Power Service products are compatible with each other and can be used at the same time. We have many customers that do not want to lose the performance improvements provided by Diesel Kleen +Cetane Boost when the weather gets cold. Each product should be added to the fuel based on the instructions on the container. Treating with less product than stated in the instructions could result in less than acceptable performance.

Yes, all Power Service products are compatible with each other and can be used at the same time. It is recommended to use Clear-Diesel Fuel & Tank Cleaner before winter to dehydrate your fuel tank to prevent icing problems when the weather gets cold.

Yes, all Power Service products are compatible with each other and can be used at the same time.

When used as directed, use of Power Service diesel fuel additives will not void any engine manufacturer’s warranty.

Currently, only Power Service Diesel Kleen and Diesel Fuel Supplement are endorsed by Cummins. While the other Power Service diesel additives are not specifically endorsed by Cummins, they are safe and effective for use in all diesel engines. In fact, Cummins dealers have access to and can sell the entire line of Power Service diesel additives.

Yes, the product is the same no matter the label. Power Service Diesel Kleen +Cetane Boost is endorsed by Cummins. No changes have been made to the formula, so every bottle carries this endorsement regardless of labeling – which is being updated to reflect Cummins’ confidence in the product

All Power Service diesel additives can be used safely in any diesel engine. The endorsement by Cummins is your assurance that our products are the best available in the diesel-additive industry.

Yes, Power Service diesel additives are safe for use in any diesel engine.

Yes, Power Service diesel additives are safe for use in any diesel engine, including those with advanced emissions control devices.

No, Power Service manufactures diesel fuel additives and they should only be added to the fuel. Power Service does not manufacture DEF. Do not add any Power Service diesel fuel additive to the diesel exhaust fluid tank.

Indefinitely in a sealed container. Once the seal has been broken, the best practice is to use the product within 12 to 18 months.

Power Service diesel additives packaged in 16-ounce, 32-ounce, 80-ounce and 1-gallon containers are packaged as single-use containers with a tamper-evident seal. Once the seal has been broken, the container cannot be resealed and product will leak if the bottle is not kept upright. The best practice is to use the container sized for your fuel tank capacity. Do not store previously opened containers in your vehicle and be sure to clean up any spills immediately.

The best time to add Power Service diesel additives is while you are filling up with fuel to ensure the quickest mixture of the additive to the fuel. However, the recirculation of fuel back to the engine means proper mixture will occur regardless of the time the product is added.

Diesel Fuel Supplement +Cetane Boost (in the white bottle) is a winterizer/antigel for use when temperatures drop below 30°F. for winter operability. Diesel Kleen +Cetane Boost (in the silver bottle) is an injector cleaner and performance improver for use when temperatures are above 30°F. Use our seasonal tip to help remember which product to use: “White for winter, silver for summer.”

Yes, we have many customers that do not want to lose the performance improvements provided by Diesel Kleen +Cetane Boost when the weather gets cold. The products are compatible and can be used together. Each product should be added to the fuel based on the instructions on the container. Treating with less product than stated in the instructions could result in less than acceptable performance.

The Arctic Formula of Diesel Fuel Supplement +Cetane Boost prevents fuel gelling and protects against fuel-filter icing. The Winter Rescue Formula of Diesel 911 is used when gelling or icing has already occurred and the engine won’t start. Use Diesel 911 to get your engine running and then add Diesel Fuel Supplement +Cetane to prevent future gelling.

Yes, Diesel Fuel Supplement +Cetane Boost and Diesel 911 are compatible and can be used together.

Our recommended Year-Round Maintenance Schedule is:
Every time you fill up:
If temperatures are below 30°F, add Diesel Fuel Supplement +Cetane Boost (white bottle) for winter operability. This Arctic Formula will prevent fuel gelling and protect against fuel-filter icing.
If temperatures are below 30°F, add Diesel Fuel Supplement +Cetane Boost (white bottle) for winter operability. This Arctic Formula will prevent fuel gelling and protect against fuel-filter icing.
(Use our Seasonal Tip: White for winter, silver for summer!)
In a winter emergency:
Use Diesel 911 to reliquefy gelled fuel and de-ice frozen fuel-filters if your vehicle will not start or gain power in cold weather.
At least quarterly or as-needed:
Add Clear-Diesel Fuel & Tank Cleaner to remove water, disperse contaminants and stabilize fuel for long-term storage.
If microbial contamination is present,
Treat with Bio Kleen Diesel Fuel Biocide to kill the microbes and Clear-Diesel Fuel & Tank Cleaner to remove residual water and contaminants

No, it will not hurt your engine to use Diesel Fuel Supplement +Cetane Boost (in the white bottle) year-round. However, for maximum performance we recommend using Diesel Kleen +Cetane Boost (in the silver bottle) when temperatures are above 30°F. (Use our seasonal tip to remember: white for winter and silver for summer.)

No, our products are not to be used in gasoline. Our sole focus is on additive technology for diesel fuel and diesel engines.

Yes, Diesel Fuel Supplement +Cetane Boost effectively treats biodiesel blends and the directions can be found on the container label. Keep in mind that biodiesel can have winter operability problems at temperatures higher than standard petroleum diesel. Refer to your owner’s manual for the biodiesel specifications recommended for your vehicle. Having Diesel 911 on hand for winter emergency use is always a good idea.

Biodiesel can contain up to 10 times more water than standard petroleum diesel fuel. This excess water can end up in your fuel tank and result in numerous problems, including accelerated fuel-filter plugging, microbial contamination and icing problems in winter. Power Service recommends treating with Clear-Diesel Fuel & Tank Cleaner at least quarterly, or as needed, to remove water. Clear-Diesel also disperses contaminants and stabilizes fuel during long-term storage.

Unfortunately, Bio Kleen is a pesticide that is only registered in the US. It is not available outside of the US.

Slickdiesel Lubricator is a proprietary Power Service diesel fuel lubricity additive that is added to many of our products to increase the lubrication properties of diesel fuel. This increase in lubricity will increase the life of fuel pumps and injectors. The fuel pump manufacturers (Bosch, Delphi, Denso, Siemens and Stanadyne) consider fuel lubricity to be the most crucial property of diesel fuel as it relates to reduction of pump and injector wear. The Engine Manufacturer Association (EMA) has stated that, “Shortened life of engine components such as fuel injection pumps and unit injectors usually can be ascribed to a lack of fuel lubricity and hence is a concern to engine manufacturers.” Slickdiesel Lubricator meets the new ASTM HFRR 520 Lubricity Specifications for the United States and the more stringent European Specification of 460 in most fuels.

Cetane is a powerful energy compound that improves the ignition quality of fuel. There is a direct relationship between a diesel fuel’s cetane number and its ignition point. The lower the cetane number, the longer the ignition delay. Fuels with high cetane numbers burn more quickly and more completely, resulting in smoother and quieter running engines, quicker engine starts, more power and improved fuel economy. In fact, The Engine Manufacturers Association (EMA) states, “Fuels with low cetane numbers will cause hard starting, rough operation, noise and exhaust smoke. Generally, diesel engines will operate better on fuels with cetane numbers above 50 compared to fuels with cetane numbers of the national average of 46.”