Hot Shot’s Secret LX4 Lubricity Extreme 1 Gallon – Treats 1280 Gallons – Fuel Additive for Gasoline and Diesel Engines, Increases Lubricity, Protects and Extends Fuel System Life

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.

been using in my 2003 7.3L we got in 2015 and now in 2017 ram 6.7l cummins we got in 2024.. keeps thing clean adn running smooth.. does it help with MPG,, not sure as I have either used HotShots or Archoil for 2 bottles then back to HS. Recently got a bottle of Power Service Diesel injector and DPF flush to help as well.. check it out..

Seems to last a while and is not too thick like some other products I’ve tried, which makes fill ups faster. I would recommend getting a small bottle with a nozzle to pour it in the take with but the product works just fine.

My 2001 Silverado HD has a 100% stock 6.6L LB7 turbo diesel, manufactured before ULSD regulations were promulgated for the United States in year 2007. For years, my engine has had an idle lope, and which recently upon fill up at a Chevron-branded station became more pronounced and was accompanied with a steady blue smoke plume from the exhaust. I suspected that the fuel pressure regulator was not moving smoothly enough and causing the fuel rail pressure to bounce around outside of target values. Since ULSD does not have the lubrication properties of pre-ULSD fuel, I wanted to try a lubricity additive, beyond the Power Service Diesel Kleen I have used since day 1. So I bought a bottle of this Hot Shot's Secret LX4 Lubricity Extreme, and added 5 ounces to my 34 gallon fuel tank that was full. I allowed it to sit overnight, and ran the truck in park for 10 minutes the first day, then let it soak again overnight. I ran it again for 10 minutes the next day in park, and let it sit overnight. The third day I drove it. The surge was totally gone and replaced with a beautiful smooth steady idle, and the blue tailpipe smoke was also gone. The exhaust from the tailpipe is now totally invisible. It's my belief that the pre-2007 Duramax engines were not engineered for the lower lubricity of modern diesel fuel, and for me, this has product is a huge blessing. (I do think the major fuel manufacturers like Chevron are meeting formal lubricity standards, but not to the lubricity level that the Duramax design engineers had in mind in earlier years pre-2007). Unless something changes, I'll use it from now on in my Silverado. Terry Livingston, Mobile, AL

Really helps improve MPG, improved performance and efficiency for diesel engines, upgraded American diesel fuel to European standards

I use this to (hopefully) prolong the life of my Bosch CP4 high pressure fuel pump in my Superduty. Only have 28k so far but zero issues. 4 oz per tankful is what I use.

Great product

I use this in our 2011 ford pickup. It runs quieter and I am getting about 2mpg better mileage.

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.

Only product we trust for our vehicle.

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.