In the quest to get more MPG out of my 3.0 TDI (currently averages 33MPG - 36MPG on a long run going easy) i thought about trying an injector cleaner
Anyone used one?
This one is a 1 bottle per tank, to give an intensive clean:
Halfords | STP Diesel Injector Cleaner 200ml
or the less intensive is this one:
Halfords | Millers Diesel Power Sport 4 500ml
Anyone tried these? Do they do any good?
The millers features a kind of "Octane Boost" as well as cleaning the injectors, but requires it almost every tank.
What do you think?