Hot Shot’s Secret LX4 Lubricity Extreme 32 oz – Treats 320 Gallons – Fuel Additive for Gasoline and Diesel Engines, Lubricates and Protects Fuel Pump and Injectors, Prevents Wear and Damage

I’ve been running this LX4 Lubricity Extreme in my F-250 and it’s a total peace of mind. I actually mix it with the Hot Shot’s Secret fuel additive (EDT), and the combination works flawlessly. ​The engine runs incredibly smooth and quiet. Since today's diesel fuel can be "dry," adding this extra lubrication is a must to protect the injectors and the fuel pump from wear. You can tell the truck likes it—the throttle response is crisp and it just feels more efficient. If you want to extend the life of your fuel system, this is the perfect add-on. Great stuff!

I use this in all my diesel trucks and equipment never had a fuel issue

I must say that I up keep my Explorer in everyway, oils changes on time religiously, coolant flush on time, all scheduled maintenance done on time, but I drive a lot of miles, 124 miles Monday through Friday, more when I have to pick up my daughter. So the wear and tear happens no matter the upkeep. Lately I've felt the car somewhat sluggish and I happen to fall upon this and read what it offers and decided to give it a shot based on the reviews. I must say that the difference was night and day, the car became more quiet, drove smoother, enhanced performance on the highway, it was a real noticeable difference. It just felt so much better when I put my foot on the pedal. Now with that said, I really didn't noticed better MPG, and maybe that was because I upkeep and baby this car. This was very simple to use, simply use 2 oz per fill up, you squeeze the bottle and it has a 1 ounce fill cup on the top of the bottle which is beyond helpful to make sure that you do not over use. I've driven over 2k miles since using this and I can assure you that it will not be a major part of my upkeep.

My Titan XD has a 5.0 cummins. This product keeps my CP4 working without issue. I have been using it for months and its great.

Good stuff and a must for diesel owners

Purchase this item through independent test and studies that showed it to work. I can only assume it's doing its job. My truck idles and runs smooth and starts up great when cold.

Works well, I won’t run any of my diesels without it

I purchased this for my 6.7L PS, to help keep the fuel system lubed and running well. I have used this on other diesels with great results; hope it keeps this one going as well.

Arrived quickly thanks.

Great product, noticeable increase in fuel economy!

Smooth! Please monitor your motor oil level closely the first few fill-ups. If it increases above the max dot, lower the treat rate.

It improved my fuel mileage by 2I/100km All the way down to 5.9I/100km from 8I/100km Also the engine is extremely smooth and quiet now. When I start my 2017 Subaru outback it used to be more slow turning over and now you can hear that there's no resistance and turning over faster.

Only product we trust for our vehicle.