Dyno-tab Octane Booster 6 Tab Cards, 3 Pack, Add Up to 17 Points Per Pack, Lab Tested for Fast Dissolving, 100% Active Ingredients, Solvent-free, 16 Gallon/60 Liter, 45456-3 Pack

Great price for octane booster. I use this in a 2017 Expedition with an Ecoboost engine. I buy cheap gas instead of midgrade and adding this gets me that extra mileage and performance that midgrade fuel would. More than pays for itself. I put the tabs in the filler spout and then put the spout into the fuel filler on the vehicle to get the tabs into the tank and mixed into the gas.

Super good, excellent quality to improve your car's gasoline. I recommend them 100%.

It can also help to clean out deposits beyond the engine but in the exhaust system as well, especially in a high mileage vehicle. It’s an interesting molecule containing molecular iron as a catalyst bound to a fuel solvable organometallic. It also raises octane and creates better combustion as catalyst.

Not sure about better mileage yet but seems to put pep in my lawnmower

Very good