Originally Posted By: Falken
The only thing that works in my Honda Fit that I can feel a performance improvement is adding 2-2.5 Oz. of TC-W3 rated outboard 2T premix oil.
I mean, it REALLY keeps the car purring along.
I used to keep it in old Gumout bottles to add to the gas tank before filling up, but I grew tired of it.
you didn't give a ratio, and also tcw is meant for low temp operation, like an outboard motor, non tcw may be better.