- Fuel testing must be done daily, checking for both water and impurities.
- It is important to check for the color change immediately after the fuel sample is mixed with the chemical in the tube. If you wait even a few minutes the sample will turn pink and you will have a false indication of water contamination.
- Up to 5 gallons of fuel may need to be drained in order to obtain a clean sample
- If more than 15 gallons of fuel are drained and the contaminants are still present, consider the fuel as contaminated.