Testimonials

It’s incredible and actually works and works well.

Richard H.

A 2003 Chevrolet V8 5.7 L engine with 273,000 miles. The engine is excellent, has excellent combustion, I replaced all the spark plugs, wires and everything I could think of to get rid of the check engine light that indicated a misfire in a cylinder or an EGR related or catalytic related error code. I'd almost given up and was just in the process of changing the EGR thinking that might be defective, thought I would try for the first time this Lucas fuel injection cleaner [Lucas Fuel Treatment]. I added probably the recommended amount, maybe a little more to the existing 20 gallons in the tank and almost immediately the check engine light went off and did not come back on. The engine also appears to start easier and run a little better, but it's too soon to tell as I've just treated it and I've only driven the truck maybe 40 or 50 miles - but by some miracle that check engine light is not coming back on and the engine appears to be running as good as ever. I have tried Chevron Techron many times, thinking it was probably one of the best cleaners available - but I don't think that's true, while it does work your product appears to work much better and I suspect I may have had partially clogged fuel injectors. Because the catalytic converters were replaced 15k miles ago when I bought this 3500 Express 1ton van, the O2 sensors have all been replaced and I would still get this engine misfire error code or emission-related error code. Your product appears to have solved my problem. I just went to Amazon today and ordered another gallon and will be looking into buying much more bulk quantity of your product and putting it in all my engines. It's incredible and actually works and works well.

Our mechanic has mentioned that our cars run great due in part that we use the Lucas products.

Chris R.

I have 2 VWs, a 2004 Passat 1.8LT Tubo with 271,000 miles and a 2009 VW Tigaun 2.0LT with 156,000 miles. Both cars are running great, and one of the reasons is because every 10th fill up we add the Upper Cylinder Lubricant and Injector Cleaner. Our mechanic has mentioned that our cars run great due in part that we use the Lucas products. I recently met the [Lucas] National Sales Director and he was kind enough to explain how the product works at keeping the fuel system clean. Keep up supplying great products.

I want to say your products are amazing.

Louis O.

I want to say your products are amazing. I have a 95 Toyota 4Runner with the 3.0 V6 and the car is very sluggish on Hills especially when towing my boat. I went fishing and put a bottle of Upper Cylinder Lubricant in the gas tank on the way up and one on the way down. Well, now that I’m back the car now has more power and better fuel economy. I was very impressed and now use it on a daily basis. The car has over 203,000 miles on it and it runs better than its ever been. My next experiment is your oil stabilizer in my dads truck. That’s a 89 Toyota pickup with over 281,000 miles on it and it will hopefully take away some of the knock and help the 20w-50 weight oil flow better in the cold mornings. So thank you Lucas Oil and I plan on buying more of your products!

It’s the best product on the market!!

Jim R., Tahlequah, OK

I use Lucas Upper Cylinder lubricant at every fill up in my 1997 Ford Ranger. It's the best product on the market!! I get improved fuel mileage and easier startups and no hesitation, especially when accelerating onto on ramps and when passing. I also like Lucas Slick Mist in between waxings.

Within a half hour my gauge started working again.

Stephen H., Redlands, CA

I started using the Lucus fuel conditioner [Lucas Fuel Treatment] when my fuel gauge in my Ford diesel truck got stuck. I was told by a friend to use it for this purpose, and within a half hour on the road after using it my gauge started working again. If you use it for nothing else, just solving this problem alone is worth it.

This Has to be The Best on The Market And Especially The Price

Randy F., Whittier, CA

I have a 2006 5.4 F-150 with 211,000 miles. My truck was running so bad the check engine light came on and I had to replace two coils it did help but it still ran really bad. I use one bottle of Lucas injection cleaner and within a 1/4 tank I noticed a big improvement, after I went through full tank my truck ran great, so I filled up another tank full of gas and Lucas injection cleaner, Wow truck runs so smooth and no hesitation this has to be the best on the market and especially the price. Thank you Lucas oil you saved me loads of money!!!!!!!

4 days later I was shocked when it passed the emissions with no codes.

Matt L.

I purchased a 2007 Chevy Avalanche and almost immediately the check engine light came on. I ran a code scanner on it and said that P0430: Catalyst System Efficiency Below Threshold (Bank 2). I thought for sure I was replacing a Cat or at least O2 sensor. I read up here to try the Lucas Deep Cleaner first. I had to do emissions on it so I gave it a try. I immediately threw in a bottle and it cleared the codes and 4 days later I was shocked when it passed the emissions with no codes. I used Lucas before and will continue putting a bottle in every 4000 miles.

I put in another bottle of Lucas and it has run perfect ever since!

Robert S., Grand Marais, MN

I had been noticing that the RPMs on my 2003 Dodge Dakota were randomly fluctuating. It seemed to be only at highway speeds above 50MPH and while idling in park. My wife and I were on a short road trip and the truck got really sluggish. I stopped at a gas station and after checking out the different automotive products I bought a bottle of Lucas Deep Clean Fuel System Cleaner. I poured it in the tank, got in the truck and my wife said, "What the heck did you put in the truck?? That noise it was making stopped!" Within 20 seconds of pouring it in the gas tank my idle evened out! Down the road again and the RPM bouncing was minimal! At my next full tank fill up I put in another bottle of Lucas and it has run perfect ever since! Thank you so much for developing such an amazing product!! I'm a Lucas customer for life now!

This stuff did wonders on my ’06 Ram 1500.

Jesse M., Williamstown, WV

This stuff did wonders on my '06 Ram 1500. At about 145,000 miles, engine started idling inconsistent. Waited till the tank was about 1/8 full and added the Deep Cleaner then filled up. Drove until I burned up about 1/4 tank truck seemed to run better than it had in years! I now use nothing but Lucas Oil products and recommend them to all my buddies.

It’s running perfect again, after just 20-25 miles of driving! That’s crazy!

Rod R., Nanty Glo, PA

I'm a pretty skeptical person. Let's face it, snake oil products have been peddled for hundreds of years. So, honestly, I had set my bar pretty low on good expectations using Lucas Deep Clean Fuel System Cleaner. My car had been running rough over the last couple months, but with the cold of winter, I didn't want to start digging for the problem, so I was just tolerating it. I had a rough idle, and it would develop a lower throttle position dead area, where you had to smash the throttle to get it to develop power again. The symptoms were increasingly getting worse, so I decided to try a fuel treatment. (I still didn't know if it was fuel or ignition, but decided to try the easiest stuff first) Reading over the available products, the Lucas product seemed like the better choice over the others. (we all know that common competitor, that is mostly just alcohol, yuck) So, I put a bottle into the tank, and topped up the fuel. I don't typically drive my car far, usually only about six miles or so, which I'm sure doesn't do it any good. But, and I kid you not, by the third trip, I noticed the low power dead spot was gone! And on the fourth trip, the idle had returned to normal as well. It's running perfect again, after just 20~25 miles of driving! That's crazy! I know the car was going through gas much faster before, and hope to see my fuel economy return as well. I'm still blown away how quickly Lucas Deep Clean Fuel System Cleaner has restored my car to normal operating conditions! Thank you Lucas!!!