D Fuel Stabilizer- Gallon Size Unit Treats 2000 Gallons of Fuel - PRI-D-Gallon

Cost effective and goes a long way. I hope it is better than Staybil, but won't know until next spring when I start my Mecury 115 hp outboard again.

I've been using the Pri-G (gasoline) product for years and it's my subjective opinion it is superior to other gasoline stabilizers. Some equipment I have, e.g. commercial pressure cleaner, I only use every year or two and it would start right up with the Pri-G (not so much with the Sta-Bil product). As regards the Pri-D fuel stabilizer, one of my several diesel Mercedes cars is 33 years old and had a sticking fuel indicator (perhaps sludge in the tank??). Use of the Pri-D fuel stabilizer seemed to free up the fuel tank apparatus so that the fuel indicator now works appropriately. I now use the Pri-D in all my diesel cars.

Use as directed. Better than any of the other products available to prevent gas going bad.

I buy this for my diesel vehicles and buy the gas kind for gas vehicles. It makes the fuel last much longer and will even restore bad fuel.

I have been using this for years and have had no problem.

Good stuff, but the packaging was inadequate. The box must have been dropped as the cap was cracked and the fluid leaked into the plastic packaging that it was shipped in. Not much loss of fluid, so I'm not going to return it.

I own a 2002 Dodge Ram 3500 5.9 Cummins, my truck runs fine, but after adding this within a few miles, once it had made it through my fuel system, I felt a smoothness I am not sure how to describe, I also noticed I could get the RPMs up to 3k much easier in each gear the further I drove… at first before it had cycled in through the fuel system I started taking each gear to 3k RPMs and in some gears it took quite a bit of time… and 4th or 5th I didn’t even think it was going to hit 3k… I just kept doing this… running through each gear and taking each gear to 3k… after I felt that smoothness kick in I literally saw each gear go straight of to 3k without effort… I saw the difference this product right in front of my eyes… by time I had done this… 4th and 5th went to 3k with the same easy all of them did… I recommend this product to revitalize your engine and I recommend you do as I did and watch how the RPMs noticeably change from the moment you get in and drive the vehicle until it starts to work its way into the system you will see the RPMs increasing more smoothly and swiftly… I have no doubt that if you have an older vehicle you will see and feel your engine get younger and more tenacious.

I like this stuff! None of the additives live up to their hype but this far exceeds what you will buy at an auto parts store.