STPSuper Concentrated Gas Treatment, Fuel System Cleaner Adds Cleaning Power to Gas, 5.25 Oz, STP

Make my car and truck run quite and better. But for my truck I need a 12oz bottle and the subscription doesn't have that option.Becareful running it with Shell Nitro gas makes the engine run rough and exhaust smell funny.

My car engine runs smoother and the gas mileage is better with STP78571. I like being able to order it online and have delivered once a month, it helps me remember to put in my fuel once a month.

good product

This was recommended to me by my brother-in-law and it works fine. Will probably buy again

My mother took it upon herself to buy a bottle of STP Fuel Injector Cleaner High Mileage. I had a full tank of gas and I put the entire bottle in my tank. That was 2 days ago. I've had nothing but problems with my truck ever since! I was barely able to get home from work! It kept trying to stall out on me! Now, I have to take it to the mechanic and pray that the damage isn't too serious! My truck was perfect before putting that crap in my gas tank! DON'T PUT THAT CRAP IN YOUR GAS TANK! IF I COULD GIVE IT A NEGATIVE 30 RATING I WOULD!

It is not that big of a deal i tried oryle octan booster i was much better for the milages

my brother is a mechanic and he says use this every year, so I do

Cylinder misfire within a week of adding it in my Acura. Had to change ignitiion coil and spark plugs because of it. I read it online about similar complaints - (...) The car had new spark plugs done 20K miles before and barely a week into using this product, there is issue. OBDII code P0305 fire up. Avoid it!