STP Ultra 5-in-1 Diesel System Cleaner

For over 50 years, STP has been trusted by mechanics and drivers all over the world to get the best out of their engine. Today, STP continues to be at the forefront of additive technology and has developed a versatile product to solve your fuel and engine related problems. STP ...For over 50 years, STP has been trusted by mechanics and drivers all over the world to get the best out of their engine.

Today, STP continues to be at the forefront of additive technology and has developed a versatile product to solve your fuel and engine related problems. STP Ultra is considered the Rolls-Royce? of additives, as it is a truly unique product in the category: a combination of high detergent additives with STP WEARGUARD technology, corrosion inhibitor and cetane booster.