This is a two part process.

We send you two field tests, one to detect DEF in fuel and one to detect bacteria/algae in fuel.

These tests are done by you in your facility.

We also send you a sample bottle to collect a small fuel sample with directions to send it directly to our lab for processing. This laboratory portion will give you a pass or fail report as to the fuel quality based on these characteristics:

API Gravity
Cetane Index
Water by Karl Fishcher
Distillation
Flash Point
Water & Sediment
Particle Count

The price is $249.
We ship the kit Priority Mail to you same day in most cases.
Once the lab gets the sample from you, you will be emailed test results within 72 hours.