Lucas OilFuel Additive, Upper Cylinder Lube, System Cleaner, Lubricant, 1 gal Jug, Diesel/Gas, Set of 4

So I've been using this in 2 cars for the last 6 weeks. A 2019 Honda Civic 1.5L and a 2016 BMW 528i 2L. Both cars very well maintained. Starting with the Honda the first tank of gas I put in 6 oz. Overall the car was running pretty good before the treatment but would shake at stop lights at times to a point of putting the car in neutral just so I wouldn't feel it. Didn't notice much of an improvement after the first tank. Second tank cut back to 4oz. Started to feel some results. No more shakes and hold the rpm to a steady 600. Third tank and the car is running the best it has in3 years. The BMW I just bought 3 months ago 84k miles in very good condition but was a bit rough and noisy running. First tank 8oz in and I could feel some things happening. Slightly better running. Second tank, 6oz in. Like the Honda the improvements began. I started to get a odd burning smell at times. No leaks so no worries. 3rd tank and still running better with the smell sometimes. I'm pretty sure carbon is burning off and that's what the smell is. I'm seeing what looks like soot on my chrome tips at times. No doubt the car starts faster and runs smoother now. I'm very interested to see how it runs after another couple tanks. Overall this stuff is a great value but don't expect instant results and I wouldn't recommend using it as a one and done. Buy a gallon and add it to the gas for at least 6 tanks of gas. Your motor didn't go bad in 400 miles and bringing it back will take some time too.

Let me start off by saying I can't speak to the MPG increase that others claim - I'm not saying that it isn't there, but all of my machines are gas guzzlers at heart to the point I simply don't pay attention. That said, I add Lucas Fuel Treatment to everything I own from my C8 Corvette, my boat with the 496 MAG HO, truck, jet skis, mowers, pressure washer, 4 wheelers, side by side, etc. Along with some other 5 star products that I'll mention below.My primary reason for use is it's an upper cylinder lubricant. I do also run SeaFoam Marine in all of my equipment as well mainly for cleaning and fuel stabilization - I prefer Marine over the original SeaFoam because it does not contain alcohol. I'm not saying that Lucas doesn't do the above because it does, but Lucas is much thicker making it a better lubricant (in my opinion) where SeaFoam Marine is somewhat thinner and to me the cleaning properties are a lot better as that's what it was designed to do years ago. You can mix and match these as you please, and you can't overdose your engine.Here's my strategy:Lucas Fuel Treatment: great upper cylinder lubricant for heavy use situations (high RPM use like 4 wheeler engines, tracking your car, heavy towing etc) Add pretty much every time I fill up, and I add a heavy dose to my truck before I do any towing. Also keep topped up on Lucas heavy duty oil stabilizer.SeaFoam Marine: one of the best injector/carburetor cleaners you can use and an equally good fuel stabilizer. I've added this to 2 stroke fuel mix for my weed eater almost 4 years ago on the same fuel and still runs flawlessly. I add to my road vehicles every so often for cleaning and before any long term storage, however I add to my smaller engines almost every fill up (ATVs, UTVs, mower, jet skis, etc) If you don't want to spend the extra money on SF Marine, the original is still fantastic. But if you are running non-ethanol fuel in your small engines, it makes sense to use the Marine so you don't add any alcohol to your fuel. Had a hesitating fuel injected 4 wheeler that had been sitting for months, stalling at idle. Added a HEAVY dose of SF Marine through it (to the point I could smell it burning out of the exhaust), did a few 3/4 throttle runs up and down the road and it cleared it out quickly. Ran as normal it for the rest of the trip and completely eliminated the stalling/hesitation.STAR BRITE Star Tron: when heavy cleaning is needed. Have injectors or carbs that are heavily clogged and gummed up? This stuff should loosen it up. Minimal lubricant properties, only use when needed.All in all, you can't go wrong with anything from Lucas or the above brands. I've tried to turn people on to these before and have been met with "it's snake oil, not needed" however I haven't had a SINGLE fuel issue in anything I own since following this strategy. Today's fuel sucks and a little preventative maintenance goes a long way.

Always a great product to have and use ! Highly recommend. Keep the price the same Amazon!

I recently tried out the Lucas Oil 10003 Fuel Treatment in my car, and let me tell you, it's a game-changer! 🚗💥 My engine runs smoother, I've noticed an increase in fuel efficiency, and the overall performance has improved significantly. It's like giving your car a nice, refreshing energy drink!I can't recommend this product enough. It's like a magic potion for your vehicle that works wonders. I've been using it regularly now, and I've seen a noticeable difference every time. If you want to give your car some extra love and care, this fuel treatment is definitely the way to go. Trust me, you won't be disappointed! 👌✨

Using this fuel additive for over a decade has been truly transformative. The difference in performance is noticeable both audibly and visually - I get a significant mileage increase and smoother engine operation. It's versatile for both gas and diesel engines, with the latter running notably quieter. A bonus is the cost-saving aspect, as the product practically pays for itself. Just be cautious not to exceed the recommended amount to avoid premature spark plug issues. Highly recommend this amazing product!

This is a great product and it works well.

I had a stumble/stall when starting off, very bad on 2016 cruze with 60k miles. Added Lucas to tank and drove ~100 highway miles. When I hit the destination town the stumble was gone and my car runs great. Seems an excellent product.

A friend recommended this product and it actually made a difference in my gas mileage. Not a lot, but about 1/2 mpg. His results were more dramatic on his Harley's. I used it in two tanks of gas per dosage and I am glad I did, since I only get about 16mpg in my old F-150; so it all helps!I have tried Seafoam and another product w/o any difference, even though they may have helped indirectly. My truck is never going to get great gas mileage, but I may add some of this every ten tanks or so bc it did make a difference. I would recommend giving it a try on a couple of tanks of fuel and see if it helps you. I have about 120k on my engine.