Originally Posted by MilesToEmpty
The VW GTI forum guys tell me to do 3500-5000... which I think is nuts since VW recommends 10k, which is what I go by. I was considering doing 7500, but the blackstone tests have come back good not indicating any reason to. My wife drives about 20k a year and its usually highway driving, or driving 20min trips between work locations. Iv'e still got one oil change worth of LiquiMoly left before I need to stock up.
With the GTI being a DI engine, is there anything I should be running through it to clean out the carbon? Every time we take it to VW they try to sell us a $400 service on cleaning the engine which I of course decline.
With those driving conditions, carbon build-up on the intake valves should not be an issue. But, carbon build-up in general doesn't appear to be a widspread issue with these Gen 3 engines, either.
I would use Top Tier fuel as recommended in the operator's manual. You could use something with PEA once or twice a year in the fuel (Techron, Gumout, others).