Gumout 510023 Regane High Mileage Fuel System Cleaner, 6. Fluid_Ounces

I use these every around every 5-6 fill ups and use the Gum Out Tune Up in the white every oil change (5k miles). My truck has 125k on these spark plugs. Put it in shop for a tune-up. My mechanic told me the plugs looked brand new, ask me what I was using

Because this is one of the few products that I am aware of that contains PEA's (Polyetheramine) I use this product in all my vehicles every now and then to clean out the injectors and intake valves to prevent carbon build up.

Backstory, I should have used fuel system earlier in my car. At about 120k, the engine started knocking, especially with the AC running. I have used predominantly Sam's Club gas, 87 octane. I never used fuel system cleaner until then (I have in my other cars, but just never did in the Prius. With the gas practically empty, I put in a bottle and only put in 4-5 gallons of gas. It definitely helped with the engine knocking. I now use it regularly (everytime the engine starts knocking again every few thousand miles.) I did originally try this on an empty tank and filled it up the tank......did not stop the engine knocking. Thus now I only put in a few gallons. Did it improve mileage....NOPE. I did not see any performance increase.

I have been using this product for years. It works great. With 100,000 miles my whole fuel system looks brand new. I never had to pay for any induction cleaning or induction services and I still have excellent spark plugs and clean pistons. Starting and accelleration are just like new. The trick, I think, is the Regane. I tried them all. I have a hybrid that is always starting and shutting down. I seldom even notice that. Of course, very old hybrids may need to have the motor mounts replaced. And I don't use it but every 1,000 miles or so - it cleans that well.Remember to only use cleaner with Regane. It makes the difference.PS I'm not an influencer or affiliated with Regane products in any way whatsoever.

Cheaper buying it in bulk thank singles at any other stores.

I used 6 of these every fill up crossing the country. My Explorer has about 80K miles and although I didn't notice much from off ramp to fwy., when I arrived and started driving a few days later it was like a new car., fast starts, responsive, and my mileage has gone up.. performance improved significantly. Yep, impressed., a 29 dollar tune up.

I did a lot of research before ordering this product to make sure it was the best.So far, I've completed one bottle and a full tank of gas in my car and my car seems to be running much better with no hesitation or lurching at speed.So, the price and performance of the product is great comparatively to the auto parts store prices which are almost double (understandably).

Saved from a $6000 catalytic converter code by cleaning my K and N air filter then adding two bottles Gumout Regane to gasoline at fill up. Gumout has never disappointed me in many years of use their products, removes carbon from emissions system.