Hot Shot's SecretSSFP Signature Series Fuel Pack 32 Ounce 2 Pack

Very impressive product!! Many of the reviews are fairly positive and I was skeptical…..First time using diesel additives and the Extreme Diesel liquid very quickly made a difference.First noticeable difference was throttle response, then acceleration, then engine sound, then mpg.My truck is 2021 Duramax with 36k miles. Came across this product as I researched EGR filter and fuel filter options. I’m hoping to conserve my truck for years to come and have learned that soot is a major problem for any diesel. On a quest to clean the whole fuel, air, exhaust process…..For less than $40 this product seems reasonably priced; it is a combo pack and you get the initial extreme treatment and the “everyday” treatment. The claimed benefits are numerous, 7….and I read the ad and the vendor site several times just to sort a make sense of it all. Lots to digest! Excited to see how both products do over the next few months.The cap on the extreme bottle was loose upon arrival but it is sealed under the cap and had a specialized tape around it…no spillage. Also, the extreme bottle has 4oz indicators to measure usage. Has a strong chemical smell. I didn’t use the entire bottle, so I am keeping the rest in a toolbox in the bed.I will update after I go through the initial 40 gallons, takes me a bit since I don’t drive a lot.Update 5/17/25First regen took 560 miles instead of 350…that’s a 60% gain.Second regen is about to start after driving 639 miles instead of 560….that’s another gain, albeit 14% improvement.And, during my most recent highway trip my mpg average shot up as high as 20.5 down to 18.5 then 19.7.I am completely blown away by the improvements due to this product.Other noticeable changes: cold start is faster; engine runs A LOT quieter…so much so that I now know what a “quiet diesel” sounds like. My throttle response is very touchy, in a good way!All real world experiences, no non sense. Just sharing because I thought all of the claims were too good to be true.

LOVE this stuff! ... use it my my track and tractor. Made a noticeable difference in each. It also helps with winter gelling.

Good stuff as always ,

Easy use bottle - seems to improve mpg

I have been using Diesel Power Service, tried this. Not too much of a difference. Also agree with a previous rating, why no easy way to refill the squeeze bottle?? Needs a second opening.

good stuff for diesel.

I picked up a f350 about a year ago that has been horribly maintained for a very long time. Started ysing this after a few other fixes and its defiantly bringing back the performance and giving the engine life.

I used this product in my Duramax diesel to help lubricate my high pressure fuel pump internals. It also helps with mileage