10013 Upper Cylinder Lubricant Fuel Treatment - (1) Gallon 4-PACK

Been using lucas in my 2007 cummins since new with no soot build up,no sticky injector's,increased fuel mileage and no check engine lights ever,never even had a single regen.177k on a ram 3500.

Fast shipping, a bit better cost wise than buying off the shelf and a LOT better price than a truck stop!

Has made a marked difference in the performance of both my vehicles. Engines run smoother, better mileage, and better acceleration. I started mixing it in my mower/power equipment fuel. They run smoother now. NOTE: it takes about 3 tanks of fuel before you start noticing. Make it a permanent part of your refueling.

Good product, keep up the good work.

Great for keeping the upper engine clean. No noticeable improvement in gas mileage, but my engine does run nicer. Safe to use every tank or to just go with an oil change as part of your maintenance program.

Great stuff for a great price

I use this at every fill up. I actually need to purchase more.

Put in vehicles with every gas change. Hope it saves us repairs. Only time will tell.