Our new fuel test kits are the first and last line of defense in eliminating diesel fuel issues.

Our diesel fuel test kits are the first and last line of defense against costly fuel problems. Never assume your fuel quality is safe. All of our kits are simple to use, low-cost, and designed to help you detect issues before they damage your engine.

If you are outside the USA, contact sales@dieselcraft.com for special export pricing.

Why Diesel Fuel Testing Matters

Stored diesel fuel can quickly develop problems such as water contamination, bacteria growth aka algae, mold, fungus, and even asphaltene buildup. Testing your fuel every 90 days—and testing every new fuel delivery—helps you avoid downtime, repairs, and expensive engine damage.

Our Diesel Fuel Test Kits

DS-1 Test Kit

Tests for: Bacteria / Algae (microbial contamination) in diesel fuel.

Diesel Fuel DEF Test – #DEF-1

Tests for: Contamination caused by accidental DEF exposure in diesel.

W-5 Test Kit

Tests for: Water contamination in diesel fuel.

FCT-100 Fuel Clarity & Water Content Test

Tests for: Overall fuel clarity, water content, and potential contamination indicators.

GAS-1

Tests for: The presence of gasoline in your diesel fuel

PH-1 Degraded Diesel Fuel Acid Test

Tests for: Test the pH of the water from your water separator

Call us for quantity pricing and reseller information: 530-613-2150

Need Help Choosing a Test?

Not sure which diesel fuel test kit you need?
Contact sales@dieselcraft.com and our team will help you identify the correct test for your situation.

If you’re unsure what the problem is, call one of our regional offices:

Fast Shipping – Priority Mail (1–3 Days)

All orders ship via Priority Mail with 1–3 day delivery anywhere in the USA.

Protect Your Engines & Fuel System

Using diesel fuel test kits regularly helps you:

  • Prevent microbial growth
  • Detect water before it causes corrosion
  • Avoid fuel system failures
  • Confirm that delivered fuel meets quality standards
  • Reduce maintenance costs and downtime

Take a closer look at each of our diesel fuel testing kits and safeguard your equipment today.