Rislone 4732 Fuel Injector Cleaner with Upper Cylinder Lubricant, 32 oz

8/12/26 - This is the fuel injector to buy. This stuff really works. We were getting a check engine light in our GMC Truck. The code was P0300, which relates to a Misfire. Three GMC service shop could not duplicate nor find anything wrong. These 3-shops cost me - 1st Shop - $348.99 - 2nd Shop was 429.46 - 3rd shop 386.67 Enough, Spent over a $1,100.00 between these shops. But 0ne shop told me I may have a gummed-up injector or 2. That what I said to each of the shop. I have seen this before. So, I started adding this fuel injector cleaner. My 1st and 2nd tank of gas I "Double' the amount of fuel injector cleaner listed on the bottle. Behold after the 1st tank and a 1/4 of the 2nd tank - there were no more codes being set. I will continue using the injector cleaner at a normal rate every time I fill up. As of 8/25/26 have not gotten a single code. Everyone should own a code reader, that way you can delete the old / set c and continue to drive.

Does a great job

It made gt mustang pick up some power seems like.

I'm not brand loyal and usually shop for certain active ingredients to the cost per gallon of fuel doped with fuel additive. This has both PEA and a "Top Lube" that helps keep my Subaru pistons happy. When I purchased a case it was only going to cost about a dollar to treat 15 gallons of fuel at the "normal dose" or around 2.05 USD if the vehicle had a known fuel related issue and needed "double the dosage". It also seemed to fix up a 4 stroke dirt bike one of the neighborhood youngsters was on in a matter of minutes... the motorcycle had trouble idling and would stall after 10 or so feet of riding.. After seeing the design of the frame and engine layout, it would take a little too long to disassemble half the bike to pull the carburetor and properly clean the jets, so he agreed to trying a fuel system cleaner instead. I popped the fuel drain on the carburetor to try and get any sediment out, added an ounce of Rislone to the fuel and topped off the tank with 91 octane ethanol free fuel. Took a few tries to start but finally got it running long enough to spray some Amsoil Power Foam into the running engine. After a few sprays it held a rough idle and let it get up to operating temperature when I sprayed a lot more Power Foam. After the Power Foam burned off he was able to ride down the road out of sight (quarter mile or so) and then out of hearing range so I'm guessing the two Snake Oils did their job and the youngster was able to get back to counting smiles per hour instead of stalls per minute.

Rislone and Bar'sLeaks is one are one of those company's that mostly fly under the radar. They make an excellent preventive maintenance products that work.

Great product! This stuff is helping my truck run great. I live in an area that there is not 1 good fuel station with certified gasoline with cleaning additives. At least not that I have discovered. By adding this product my truck is getting the lubrication it needs and the cleaning agents it requires to keep the injectors plus the O2 sensors healthy. It works and MADE IN THE USA!

So it’s a little more viscous than Lucas fuel treatment and was priced well but after 2 32oz bottles and thousands of miles my mpgs did not improve. The engine appeared to run a bit smoother and acceleration was a bit better but that extra oomph disappeared after the first tank.

good stuff