“We have been running Dee-Zol diesel fuel additive for approximately two years. We are very pleased with the results. We are able to run #2 fuel year-round with no diesel gelling problems. We have encountered temperatures of -30 for four to five days at a time. The only thing we have had to do is better fuel filter maintenance. We are very pleased with your product and will continue to use it. We mix directly in our bulk tanks at the time of delivery.”
State Department of Transportation
