I've been playing around with using TCW3 in my diesel vehicles for some time, and I've undeniably seen a 1-2 mpg improvement with it than without it.
Looking at it from the other side of the table, I can't argue against it. Even doing things like running half the fleet on it, and half off, and then switching both halves around, there's 1-2 mpg gain with it, that is demonstrably lost when not used.
I've found my best results using a full quart in a 40-gallon sized tank.
Use with gasoline engines has been mixed. I get 2mpg improvements with some, and absolutely nothing with others.
Looking at it from the other side of the table, I can't argue against it. Even doing things like running half the fleet on it, and half off, and then switching both halves around, there's 1-2 mpg gain with it, that is demonstrably lost when not used.
I've found my best results using a full quart in a 40-gallon sized tank.
Use with gasoline engines has been mixed. I get 2mpg improvements with some, and absolutely nothing with others.