I tried the vp113 and I didnt really get real time results due to problems at the track. What I did notice is that when I replaced my
intake gaskets the runners were all gummed up like somebody melted jelly beans in there and it was all throughout the head also. I called VP and I was told that was normal due to the air meeting
the fuel and that it would all burn out when the engine is warm.Also, you cannot leave the fuel in the car,due to it losing its properties when air meets the it. It has to go back in the can and some just put a cap on the vent tube.