Like its sister product for gasoline Mix-I-Go, Dee-Zol has been providing value and solving problems for customers for decades. First developed in 1957, Dee-Zol is the most complete high-quality diesel treatment in the marketplace today.

Whatever kind of diesel engine or vehicle you're treating, the Dee-Zol family of diesel fuel treatments has a solution that's right for you.

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DEE-ZOL CONCENTRATE - the original formula, first formulated by Robert J. Bell in 1954. As diesel engines have advanced, so has the Dee-Zol formula, keeping it still the most effective multi-function diesel treatment available.  It still solves most common diesel fuel issues, with a  concentrate formula (1 oz treats 10 gallons) to provide great value.

DEE-ZOL PLUS - provides all the great benefits of Dee-Zol, with cold flow improver added to the formula, for extra protection against diesel fuel gelling in cold weather.

MARINE DEE-ZOL - even more concentrated than regular Dee-Zol, Marine Dee-Zol packs commercial-grade detergency and water control into a formula that solves marine diesel issues at just one ounce to eighteen gallons.

DEE-ZOL ONE SHOT -  Diesel users with small tanks find Dee-Zol One Shot an excellent solution to optimize the diesel in their cars and trucks.  One 12 oz. bottle treats an entire tank of diesel fuel in most vehicles.

Don't miss our other DIESEL ADDITIVES!

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Trust commercial-grade Dee-Zol fuel treatments. Thousands of satisfied consumers since 1909 trust Bell Performance because they know that Performance Counts!