Lucas Oil LUC10020 Fuel Treatment - 5.25 Oz, multi-colored

This stuff is great. I had a small 1400 watt inverter generator that was sitting in the garage with fuel in the tank for the past six months. We just recently had some tornados hit the area and knocked out the power for about a week. I started up the inverter generator, and it worked, but had a really rough idle. It would rev up and down with no load on the generator. I put about 3 ounces of this stuff into the gas tank, and within 20 minutes the generator was running as smooth as the day I bought it.

Have been using Lucas products for a very long time, no complaints, only quality products that actually work. Bought a newer vechile this last January, 2015 Pathfinder, and it was not getting quite the gas mileage I was expecting, starting using this Lucas upper injector cleaner before I did a extensive and expensive coil and plug change, as I have with every vechile I've owned the last 20 years, and after only a few fill ups, had improved gas mileage by nearly 2 miles per gallon. Tried about every other brand on the market, nothing comes close!

Increased my mileage from 15 to 18/19 on my GMC Duramax 6.6L in town. Increased my mileage on my 2007 Lexus Gas 8 cylinder from 18 to 22. I'm using it in everything. Good price for results

Good quality Works Great. Tried other name brands but always come back to this one. It just works ! Stops smoke from Perkins 6.354m. Only one that stopped the smoke

I guess it works, I was getting 9 mpg on my motorhome before using when added to fuel and pulling a car hauler with car at 4500 lbs it was getting 8.4 mpg.

Beware if you have a newer vehicle with out a gas cap (Fords and Hondas for sure) these gas necks have a flap about four inches down that the gas nozzle opens. It you try to pour the Lucas lubricant into the tank without opening that flap… it will back up and you will have a mess. Wound up getting a clear 5/8” hose at a hardware store to open the flap , then squeeze the oil from the quart container into the tank. It work, but it’s not the best. You don’t want the hose to fall into the tank. I did not see an Amazon solution to this issue. But the engine does run better and mpg is good. If you snip off the nozzle on the bottle, find a good cap or the oil will go everywhere…

The stuff really works. I didn't notice any difference with the first time I used it. The 3rd time I definitely noticed at the end of the week with my normal commute I get almost a quarter tank better. I used a little more than they suggest per application only because they said you cannot over do it. Each time I used it I used a little more and that's when I noticed the difference.

User BEWARE: If you have a newer model car with the capless gas cap, you will definitely need something to open the area into the gas tank so the oil can reach where it needs to go. Someone posted about using 5/8” vinyl tubing so I went for it. Yeah, it worked great until I couldn’t pull the tubing out & it was hades trying to remove it. Luckily there was a YouTube video that showed me how. I was almost in tears but the YouTube video saved me, along with a 18” flathead screwdriver that I inserted inside the hose and pushed against the lock clips. I would imagine there is a funnel designed for this so make sure you buy that instead of doing the tube method.