I was recently sent a bottle of STP Ultra 5-in-1 Fuel System Cleaner to try out, and it couldn’t have been better timing with a Southern California heat wave hitting; our already pretty crummy 91 octane “summer blend” fuel is working extra hard to help fuel my turbocharged inline 5 cylinder Audi TTRS. STP has developed a 5-in-1 solution designed to deep clean the fuel system; it also contains friction modifiers that lubricate engine parts such as piston rings and cylinder walls, and keep on top of the negative impacts of the ethanol blended into the gas. Based on STP engineering tests, it’s been proven to remove an average of 60% of ethanol deposits from engine parts and restore 95% of original injector performance. While our friends in Canada have ethanol free gasoline, it’s pretty much impossible to find here in the States, so it’s a good idea to use this once every oil change.
One bottle is good for up to 35 gallons, so I was able to add half the bottle to my car (12 gallon tank) and half to my wife’s (13 gallon tank) and keep us both good. It’s recommended to top off a tank that is at least half full, so I just added the cleaner after filling up the tank. The new bottle is also compatible with cap-less systems, which my wife’s Ford Focus happens to be.
You may not notice a dramatic improvement right away, but for less than $15 it provides peace of mind that you’re doing what you can to keep your car running well on top of normal maintenance items like oil changes and etcetera. I also highly recommend using top tier gasoline with detergents to help keep your fuel system clean after Ultra cleans it up. If you find yourself putting low grade gasoline into your car on a regular basis, or worse yet skimping on premium when your car recommends it, you may want to pick up a bottle of STP Ultra 5-in-1 Fuel System Cleaner even more often and redeem yourself for your indiscretions!