hi guys one of my mates has recommended that i use redex for better mpg i have a 1.9tdi pd engine and for £20 i am only getting around 90miles i have changed air filter, fuel filter and it has a new maf sensor, what do you guys think, would redex work or am i better without it thanks guys
and if i do use it would it harm the engine?
and if i do use it would it harm the engine?