My Xr3i (EFI) has just done 82k, I've jst bought some Red-Ex injector cleaner as it claims I'll get more miles for my money and I have noticed a little drop in the MPG over the past month or so.

Is it worth me putting this stuff in next time I fill up?

 

no as the engine gets addicted to it, so if u keep usin it everytime u stop itl run crap. and apparently if you use it alot it starts rotting the seals so only use it every now and them m8

 

It would certainly be of little benefit compared with a proper ultra sonic clean.
As to getting addicted, I'v heard the myth, but how a lump of metal gets "addicted" I still haven't got my head around.
I have always found millers injector cleaner to be the best one I have used.
tabetha

 

try 10K boost. i stuck it in the cossie and seemed to work wonder's on that.

 

I stuck half a bottle in with £35 quids worth of petty.. I'll see if it makes any difference at all, if it does i'll use the other half.