Hot Shot's SecretDiesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine Performance

I don't really know how this works inside the engine, but I feel the car quicker and more powerful from a "butt-dyno" point of view. Worth a try.

I just got this product and I must say, it worked a little too well. For context, I live on a tropical island in the Caribbean. So poor quality diesel and short journeys are normal for us. With about half a tank of diesel, I put this product in my 2021 Nissan Navara Pick-up which has been sluggish because of the DPF system installed. I left the pick-up warm-up for a few minutes before I hit the road. I notice a difference in performance instantly on my take-off from my garage. It felt so different, that I honestly got nervous and went straight to the gas station to fill up. Let's hope the improvement continues. I may update if anything drastic happens.

I would say very good stuf used for semi truck cleaned injectors pretty good

I was looking for a good diesel fuel additive that would clean my injectors and burn at a hotter temp so I read lots of reviews and ended up getting this brand. I’ve used it on 4 tanks of gas and I have to say that my rig runs much smoother, starts easier, and I definitely have more horsepower. It’s almost like I’m driving a new truck…and my truck just turned 30 years old a few days ago. Definitely recommend this additive…I’ll be buying lots more of it!

Was recommended.

I've used other products that had some effect but Hot Shot Secret Diesel Extreme leaves the competition in the dust. I drive a 2005 Chevrolet 2500HD Duramax. With Hot Shot Secret the average fuel economy is over 20 mpg. The best mileage I could get before using Hot Shot Secret was 16 mpg. I snapped the photo at the end of a long drive which included scaling some of the highest passes on I-5. Getting 20 mpg in a 7,000 pound truck at 70 mph is amazing. With nearly 200,000 miles on the truck I've never had any issues with the injectors. Hot Shot Secret Diesel Extreme keeps injectors clean and raised the cetane level which is why it produces such great performance.

Fuel additives specially designed to clean fuel injectors must be used continuously and timely during fuel up intervals to be effective.

07 Cummins had a low cylinder due to the injector. Poured this in a little stronger than recommended took it out a drove the mess out of it for a little over 100 miles. I rechecked it on the scanner after the drive and the cylinder had picked up. I was doubtful many years as a mechanic I don’t believe in mechanic in a can but a diesel mechanic I know said he recommended it so I gave it a try. It’s now several months later and the truck is still running great.