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Diesel Fuel Testing

Test diesel fuel in 5 minutes - without a laboratory!

Learn More Purchase Kits
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Water & Visual Clarity Test (FT-0100)

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Generator Fuel Test Pack (FT-EQX-SET)

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Microbial Contamination Test (FT-0110)

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Bad diesel fuel can have profound and costly effects on diesel engines

Fleet Fuel tests are simple, on-the-spot fuel tests for verifying the quality of diesel fuel.
Our tests are quick and easy to use. Fleet Fuel tests are the most cost-effective way to check for:

Entrained Water in Diesel Fuel

This is our best-selling test. It is used for on-the-spot testing and during vehicle maintenance to identify fuel that contains high amounts of entrained water or other contaminants. Using fuel with entrained water can result in blown injector tips and other fuel system issues.

Microbial Contamination in Diesel Fuel

Microbial contamination occurs in fuel tanks, where the microbes feed on the fuel and can be drawn into the fuel system causing filter plugging and fuel oxidation. This test will detect both yeasts and molds as well as aerobic bacteria - the most common causes of microbial contamination.

Diesel Fuel Degradation

Diesel fuel can become oxidized due to normal aging and as a result of microbial activity. Oxidation essentially increases the acidity of the fuel and can cause damage to fuel injection systems with prolonged use.

Works on all Diesel Fuels

Diesel #1, Diesel #2, jet fuels, offroad (dyed) fuels, marine fuels, and biodiesel. The tests are small and durable, and are ideal for use in remote locations, where laboratory testing is not practical.

For a complete list of diesel fuel tests, click here. For more information, call (858) 519-8006 or email us at orders@fleetfueltesting.com

Recent News / Check out our blog

All UK drivers issued supermarket contaminated fuel warning

Oct 11, 2024

Drivers filling up at UK petrol stations and garages have been warned over petrol and diesel contamination.

Drivers furious as fuel from major supermarket with 500 stores ‘is contaminated and causing cars to suddenly break down’

Oct 07, 2024

Some drivers, however, are now fuming that they are hundreds of pounds out of pocket after filling up their cars with what is thought to have been contaminated fuel from one the supermarket's petrol station.

Water Found in Fuel at Coral Springs Chevron Gas Station Led to State Shutdown, Experts Warn of Potential Damage

Oct 04, 2024

CORAL SPRINGS, FL - The state recently shut down the Chevron Gas station at 5420 N. University Drive in Coral Springs after tests showed its gas was contaminated.

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  • Fleet's tests give my customers peace of mind and have literally saved us thousands of dollars that we would have spent on bad fuel!

    John V, Fuel distributor

  • We use these to test diesel deliveries in places that are too remote for lab testing. Testing protects our extremely expensive, mission-critical generators from damage due to contaminated fuel. Thanks, Fleet!

    Steven G., Field Engineer

  • Fleet tests are the easiest way to check up on our fuel storage tanks. Now we can identify fuel problems without shipping fuel to a lab!

    Andy W., Fleet manager

  • Fuel quality is a big problem in Iraq. One bad tank of diesel can take down an emergency vehicle and it may take months to fix it. Since we've been using Fleet tests, we have seen much fewer issues related to bad fuel.

    Karwan, Managing Director