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Well I added the Fuel Improver and got some results. I emptied the tank and put fresh fuel in with the OptiLube XPD. I let it run for 30 minutes then ran the truck. As I was driving the truck. I noticed in my blindspot mirror and nice long line of exhaust. Gray and white, slight blue hue to...

If the Fuel Improver is lubricating the injectors better and helping produce a better spray pattern than before, its more efficient. If it's more efficient it must make a difference in the power or fuel economy since there is now less restriction than before. I am not a mechanic but it would...

I would think it would help create a better jet being sprayed into the cyclinders. Maybe not. The fuel additive is supposed to be mixed with diesel. Maybe thats why there was no difference. I guess no matter what it's hard to diagnose whether it creates more power, because who has a dyno to...

If you like the XPD. Get the oil fortifier and do an oil change. You will love the results of the product on your trucks.

I didn't put it in yet. Does it make any changes whatsoever? Notice any HP gains? I would think if it helps lubricate better it will run better. Less friction

Did some more driving. I drove the truck harder tonight on steeper grades and the truck didn't break 200. Hovered at 190 or so. It seemed to do great on hills. Also, after letting the truck cool down, I looked at my engine temp. The truck was down to 160 degrees. Normally it would.cool...

I have no way of identifying how much of an increase there is. Wish I had a way of determining what the actual gain is. I live in the mountains. When downtown gets 6 inches of snow we get about 10-12. The constant mountain driving puts me in 2 gear high. I didn't have to downshift out of...

I bought it from their website. There are tons of customer reviews and these findings range from people who race in NASCAR to multiple large tractor companies and use this stuff on a continuous basis. Look up their website and take a look at it. There are people reporting up to 30% increase...

I wanted to post my findings. If anyone owns a Diesel Military vehicle, I strongly recommend purchasing a quart of Opti-Lube Oil Fortifier and putting it in their next oil change. You wouldn't believe the differences it made almost immediately. You add one full quart on a oil change and after...

Hi everyone, I just purchased some Opti-Lube XPD and Oil Fortifier and I am going to run it in my M35A2 and see how much of a difference it makes over the course of a new tank full of Diesel and a new oil change tomorrow. The Opti-Lube was rated second highest in a ULSD study and people have...