Injector cleaner? - SimonJ
Do any car manual specifically recommend NOT using an injector cleaner?

Can they do any damage?

Does anyone uses one? What would they recommend? Greased lightening, Cataclean, Redex, Wynns? etc
Injector cleaner? - Roger Jones
I use VW's own fuel additive (part number G 001 700 03) in my Golf VR6, MB 320 Coupé and Capri 2.8i. No known problems; several known benefits -- instant cure for cool-running problems on an Audi 100, likely factor in very low emissions readings from VR6 at MOT. Heartily endorsed by my German-car specialist mechanic, I have every confidence in it, and I thank HJ for putting me on to it in the first place.
Injector cleaner? - was8v
Use paraffin? apparently its the same stuff 1ml per litre of petrol.
Injector cleaner? - Armitage Shanks{P}
HJ speaks well of Miller's Diesel Plus. It apparently helps increase the 'lubricity' of the fuel, which is reduced if it is a Low Sulphur blend. It also has other benefits reported here like a double dose reduces emissions if used just before an MOT.
Injector cleaner? - Dynamic Dave

Forte fuel treatment is v.good.
Injector cleaner? - Sooty Tailpipes
These always seem to smell of cheap things such as paraffin, kerosene and ispropanol. Yet they change a lot of money.
Injector cleaner? - Armitage Shanks{P}
DD. Is the Forte stuff available to the public, if so from where please? I had got the impression that it was a 'trade only' product.
Injector cleaner? - Dynamic Dave
AS,

My local Vauxhall dealer sells it to the public, and I vaguely remember someone saying certain ATS tyre/exhaust places as well.

Couple of threads here that mention locations as well.

www.honestjohn.co.uk/forum/post/index.htm?t=15483
www.honestjohn.co.uk/forum/post/index.htm?t=16478
Injector cleaner? - chris k
change the engine to a v8 they put these in the triumph stag years ago. I had one that had done spaceship miles and it only let me down once on the way back from jupiter.
Injector cleaner? - MB
You're not supposed to drink it - just put it in the car...
Injector cleaner? - Aprilia
Most, if not all, aftermarket petrol additives are just a detergent surfactant to allow the petrol to 'wet' the component surfaces and dissolve any deposits ('gum', of which where is about 1-5mg per 100ml of petrol).
Parafin will do this, to an extent.

As far as I know all petrol sold through the UK retail filling stations has detergent added. This may not be the case for fuels distributed by other means (e.g. petrol for racing/rallying etc. and for engine research & development).

Injector cleaner? - kithmo
Ford's advise not to use oil or fuel additives in the vehicle handbook, but I just use Shell Optimax all the time in the Mondeo V6 and it runs as smooth a silk (I must go find a piece of wood to touch now);).