Performance You Can Rely On

4+ is a superior-quality line of fuel additives that will reduce downtime and extend the life of your engine & equipment.

Shop Now

KEEP YOUR FUEL SYSTEM CLEAN

Reduce downtime with the 4+ high concentration solution. It is easy to use, and safe for all engines.

4+ FUEL ADDITIVES

4+ Aqua Tek: Eliminates Water

4+ Aqua Tek: Eliminates Water

$40.01
4+ Arctic: Anti-Gelling

4+ Arctic: Anti-Gelling

From $26.37
4+ Diesel Melt: Emergency Anti-Gelling

4+ Diesel Melt: Emergency Anti-Gelling

From $16.97
4+ Furnasafe: Efficiency for Heating Oil Furnaces

4+ Furnasafe: Efficiency for Heating Oil Furnaces

$36.33
4+ Gasoline: Engine & Fuel System Cleaner

4+ Gasoline: Engine & Fuel System Cleaner

$13.93
4+ Polar Max: Winter Anti-Gel

4+ Polar Max: Winter Anti-Gel

$25.45
4+ Premium: Fuel Treatment for Top Performance

4+ Premium: Fuel Treatment for Top Performance

From $24.97
4+ Super Clean: Anti-Gum

4+ Super Clean: Anti-Gum

$31.43
4+ Sure Shot: Multi-Purpose Premium Treatment Case of 12

4+ Sure Shot: Multi-Purpose Premium Treatment Case of 12

$106.05
4+ Turbocharger Cleaner

4+ Turbocharger Cleaner

$41.95

"WHEN I TRIED THE 4+ FUEL ADDITIVES, I WAS BLOWN AWAY AT HOW WELL THEY WORK. THEY ARE BY FAR THE BEST I HAVE EVER TRIED, AND I’VE TRIED ALMOST ALL OF THE DIESEL ADDITIVES ON THE MARKET."

– CJ Muscha, DAK Diesel LLC

Blog

How To Keep Your Stored Diesel Fuel Fresh

100% truth? The quality of diesel does not last and it can definitely go bad over time. The average it can be stored is from 6 to 12 months. Under the best conditions, maybe it can extend longer. Generally, if you want to lengthen the life of the quality of stored diesel fuel, the following conditions must be met.
Continue reading