Diesel First Aid: Fuel and Tank Contamination Test Swabs are a diagnostic tool to test diesel fuel to determine if it is fresh, marginal, or bad. Contains 10 test swabs to test for bad fuel (oxidation), water contamination, rust / scale, and sludge / asphaltenes.
How to Use:
Step 1. Open package and attach 1 swab to extendable probe.
Step 2. Submerge swab into fuel tank until touches lowest point at bottom of tank. Brush tank bottom several times with swab.
Step 3. Remove swab; let dry for 2-3 minutes (do not exceed 3 minutes).
Step 4. Compare to diesel fuel & tank test chart in package.
Store sealed test kit in a cool, dry place out of direct sunlight. Shelf life is one year from first opening.