Quote:
Originally Posted by hogweed
Interestingly, I’ve been doing more longish-distance driving lately, and driving VERY gently to see what sort of mpg I can get.
Car had its MOT on Tuesday, and failed on emissions. The garage put some sort of cleaner in it, and told me to give it an Italian tune-up – I did, brought it back, and it passed.
What does the cleaner do, exactly, to improve emissions? Or was it irrelevant, and just the good thrash that brought it back within acceptable limits?
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most cleaners are just highly refined fuel, sometimes with charged particles in which bond to contaminates and get blown out of the exhaust... they also burn hot and can shake loose carbon etc...
I normally run the tank very low and put 2 bottles of injector cleaner in just before a 3rd gear run to work (10 miles) to clear everything through... works well...