High performance Fuel catalyst?

[loxxr6]

Parents used a fuelstar on their Falcon. One time they had a prob where it leaked and petrol fumes came out. That got fixed no probs tho.

My stepdad used to do hundreds of thousands of km's as part of being a rural auctioneer and real estate salesperson and he thought that it did make an improvement on economy but I don't think he said power was any different.