I dono, but got all my chems for mixing the brew, put it in tank, filled up, got on down the road, needed a little getti-up, so gave a little petal, and ya know what?, I don't know if is my imagination but it seemed I had a little more power, now it may be with the combo of fuel filter/air filter change, i dono? but it sure runs nice.

 

I had a similar experience when my truck had under 17~18k on it... ran smoother, reved easier and seemed to have more power. once it broke in moreit stayed that way all the time

 

Power Service has a cetane booster in it. the grey bottle increses cetane by 6 points, white by 4. this is the same effect as putting octane boster into a gasser.