Hot Shot's Secret Everyday Diesel Treatment 32 oz, 6-in-1 Diesel Fuel Additive - Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane

If you simply follow the directions, then this is an excellent product! If you intentionally use too much thinking that more product has to be better, well, then you deserve what you get and very likely you'll end up killing your expensive fuel injectors or the equally expensive fuel pump as a result. Follow the directions for use exactly and measure out the correct amount of product. This is not going to repair years/decades of neglect and pre-existing internal fuel system corrosion/damage/wear issues, which should go without saying, but I've read the low-rated reviews, which are few. Got the 32oz bottle to try, as better value compared to the smaller 16oz bottle/squeeze bottle. The only downside is you really need to follow the directions for use and measure out this type of fuel additive to avoid using too much of it per tank, which is significantly more difficult with the larger bottle size. As others have noted the caps on the larger bottles don't seal very well, and product is not something you want to keep inside your vehicle (or anywhere enclosed really) unless you bag it and ensure it cannot fall over. Failure to follow the product directions (just pouring it in freely) can result in damage to the very expensive injectors and fuel pump, etc., which is also true of other branded diesel fuel additives as well. Follow the directions and you will very quickly feel the difference in throttle response compared to pump diesel. I use the top-tier diesel fuel and supplement with this product. I get much lower running noise, better fuel economy, less DPF regenerations, and significantly better throttle response. The driving 'fun factor' alone is worth the price of this product, but I actually buy it to protect my aging HPFP and original injectors in my '10 Audi Q7 TDI...those bits are kinda pricey to replace. I used Liqui Moly products prior, and those are great too, but more expensive, so now I'm on Hotshot's EDT, and my TDI loves it. :)

Good value. I have used this in trucks and tractors and other equipment. It is a higher dosage rate than the regular EDT but I feel like along with keeping diesel from gelling up it is also some insurance as far as lubricity on the injection pump and other components and hopefully will help everything last a very long time. So far I have not had any gelling issues using this. I think the main thing to keep in mind is treat your fuel and use some to get it through the filter, pump, etc before it gets cold out. Make sure to treat per gallon and also for the cold expected.

I am a believer! Got an endine light and when ran codes got P0401. my friend said that could be very expensive. He suggested to give this a shot and take my diesel on highway with greater speeds and run it. So I did. No more light no more codes! I now add it every other fill to keep up with it. on my 2009 SUV I used similar products but for gas engines and that baby runs awesome at just about 250K miles!

delivered fine, but when i try to close bottle it is difficult to make it leakprood. So if it falls over it leaks.

Very pleasantly surprised. I didn't expect to notice any difference in my old IDI diesel that has more in common with an old tractor engine than modern automotive engines, but it's been quite an improvement. Engine idles more smoothly, much quieter, revs more readily, and I've had to recalibrate my right foot because less throttle is needed to get the same acceleration. So far I haven't noticed any fuel efficiency benefits, but my right foot has been enjoying how much better the engine runs. Even if I don't get any fuel efficiency benefit, for the very minimal cost of the additive I'll happily run it just for how much better the engine runs. Bought a bunch of dose size bottles here on Amazon that I transfer the fuel treatment into, easy to dump a bottle in the tank before filling with diesel.