Testimonials

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.

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.

Since we stated using Lucas Oil Marine Fuel additive, we have realized an overall increase in fuel economy in the range of 8-10%!

Mike R.

We learned about the Lucas Oil Marine Fuel additive about 5 years ago and have been using it with great results ever since. We run two heavy duty work boats on a daily basis in harsh marine conditions. Since we stated using this product, we have realized an overall increase in fuel economy in the range of 8-10%! In addition to the fuel additive, we also use the Lucas CK4 oil to which we add the Lucas Oil stabilizer, which allows us to extend our oil change intervals, resulting in substantial annual cost savings. Our boats are critical to our operation and we trust the Lucas Oil products to keep our boats going strong!

This stuff is amazing. Will be adding a quart with every oil change.

Aaron M.

I’ve got a 2005 GMC Savannah with almost 300k. Started using alot of oil. Needed a liter every 500km. The oil pressure would drop so low at idle that the light came on. 3 min after adding a bottle of this Engine Magic you call Stop Leak and my oil pressure is right back to where it should be. This stuff is amazing. Will be adding a quart with every oil change.

Picked up a bottle of Lucas Stop Leak…and the problem was solved!

Bob B.

My Kubota Tractor had a Transmission Seal that began to leak. Within a few months it began leaking badly. Contacted Kubota Service Department and was told $1,000.00 to split tractor and replace seal. Picked up a bottle of Lucas Stop Leak.......and the problem was solved! Thank You Lucas!

I am amazed! This product works!!

George F.

First of all, I don't typically writes reviews or testimonials, but I can't keep this to myself. Background: 2005 Chevy Suburban 1500 (8cyl, Vortec 5.3). 235k miles. A horse! Rear main seal leak for about this last 12-18 months. Recently developed a front seal (crankshaft) leak that was making a mess under the hood (oil spray) and stinking up the garage (oil burning off hot block). I'm thinking its time to replace the front seal, harmonic, etc. My mechanic recommended giving LUCAS ENGINE OIL STOP LEAK a try. So I did. Drained the oil, changed the filter, and filled her up with 5 qts synthetic + 1 qt LUCAS ENGINE OIL STOP LEAK. I figured it might slow the leak, especially with the weather getting colder. Well ... Day 2 and NOT A DROP. Zero. Zip. Zilch. The leaks - both front and rear - have stopped. Not to mention, the engine feels better than it was for awhile. I had some occasional valve-lifter tapping. Gone. She purrs on idle and has improved acceleration. I am amazed! I guess I need to wait and see how long the good news lasts, but for the time being ... This product works!! Try it before you spend a few hundred bucks or half your day. Rock on!

The leak had disappeared completely in a matter of days.

Red S., NC

I have a 1987 Ford F150 with over 260k miles. It developed a rear main seal leak and not worth the money to have it replaced on a vehicle this old. Put the whole bottle of Lucas Oil Stop Leak in my next oil change and the leak had disappeared completely in a matter of days. The truck is also running smoother and the inline 6 engine sounds better than it did before.

Leak Gone, The Stuff Is Amazing

Christopher R., Ocean Springs, MS

My 2011 Mini Cooper S developed an oil leak at 80K. Took it to the shop. It was a seal on a hose coming from the engine block. In order to replace they’d have to remove the front Drive and a bunch of other components just to get to the seal (nothings easy or a quick fix on a Mini. Nothing!) $1600.00. I went home removed 1/2 quart of oil, replaced with Lucas Oil Stop Leak. Drove to work and back next day around 40 miles total. Leak gone. It’s now got 85K and no leak. The stuff is amazing. Going to put some in my F250 Powerstroke w/250K on the next oil change. The stuff is amazing.

And To My Surprise, It Has Worked.

David A., Peoria, IL

I personally just purchased a 2000 Toyota Camry with a significant oil leak when running. I used the stop leak Lucas engineered and to my surprise, it has worked for now. I'm hopeful that it's a long term remedy and in the future I'll be treating my engine with this every oil change considering the car is running after 270k!

No More White Smoke, No More Oil Burn!! Works as Advertised!!

Kyle S., IL

My 2006 Chevy Silverado developed a valve seal leak do to my improper maintenance practice at the time... There would be a puff of white smoke out the tail pipe every few mornings when I'd start my truck from oil seeping into the combustion chamber. I put Lucas Engine Oil Stop Leak in. After a few days like the bottle says, no more white smoke, no more oil burn!! Works as advertised!!