Lucas Oil10003 Fuel Treatment - 1 Quart

Been using this fuel additive for the last 12 years can really see and hear the difference when not used I do get a mileage increase with the increased fuel mileage, I believe this product pays for itself. But also, the engine runs smoother, I use it in both gas and diesel engines and in diesel engines, it makes it so much quieter I also added to fuel that I leave in fuel cans the only downfall to this product is if you use more than what is recommended as I used to do It would foul out spark plugs sooner than needed. But that was my fault, not the product I would highly recommend this product works great in older engines with high miles also very effective in both carburated and fuel injected engines

Awesome product. Have a 200k mile 2005 Grand Marquis that I use for grinding miles that was starting to run rough at idle, then at 25 mph, then 35, finally 45. Put 1.5x recommended dosage and now idles smoothly within the first 10 miles of using the product. Highly recommend.

Had bad fuel in our boat motor didn't run the best added this and bam 20 minutes later motor ran excellent.

I toss a little in every time I'm doing my 5k or six month maintenance. I've never noticed much of a difference with lower mileage vehicles, but I've seen good enough results with high mileage vehicles that I figure it definitely can't hurt. Things like better mpg, engine running more smoothly, etc. Super easy to just put a little bit in the tank and one bottle lasts a really long time. Fuel injector cleaner is also listed as an optional maintenance item for my car, so....

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

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!

Is it snake oil? Who knows, but it makes feel better to use on my high mileage car. I have no real way to know if works though.

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.