Quote Originally Posted by Transporter View Post
In petrol engines incl. TSI I use only only Interject injector cleaner every service interval. To me it is the best injector/fuel additive you can have, it does clean whole fuel system and the top of the pistons.
I notice Interject comes in 413 R, 414 R and 415 R. Do you know what the difference is, and which shoud I be chasing for a 1.8T?

Thanks.