Opti-Lube XPD All-Season Diesel Fuel Additive - Long Neck 8oz Bottles (4 Pack)

Good product, these are nice size bottles, easier to carry in truck and long neck make it easier to use without dripping on paint.

The first filter/water separator on my Powerstroke gets dirty faster from OptiLube binding the junk in the fuel making the filter more effective. Significant MPG increase as well, at least 2-3 mpg. I run 8 ounces every fill. Even my active regens are improved by being more consistent & taking the DPF to 0% in less time it seems. The long neck bottles are awesome because the stuff stinks but the long neck bottles prevent it from getting on your hands. My son is getting some for Christmas bc I pay for the truck. I really believe OptiLube’s claims as I have witnessed them. I’ve been a Powerstroke driver since 2004. I put it in my diesel Kubota UTV and its top speed increased from 19 to 21 mph! It starts like the day I bought it with 6200 hours and consistent maintenance. Same with my John Deere 4066R

cuts down fuel pump wear 50%, great product

Hard to say how well it actually works, but it has been well Reviewed by many testers. I switched from Hot Shots because it makes it much easier from my wife. All she has to do is dump in a whole bottle per tankful… and that’s much easier with the long spout than having to measure out the hot shots and use a funnel. She had to carry an unsealed bottle and a funnel in a Ziploc bag in an effort to prevent smells and spills in her car with Hot Shots.

Seems to work well for my dirtymax!

can't really tell but this is the highest rated product out there so I will continue to use, one container per tank of fuel added

So far so good! Stickers are a pretty cool touch too! Trusting the product so far

Came sealed tight, no product leaks. Kept things flowing when the temperature got down low. No noticable temp increase as with other additives. Priced right for packing.