Obviously I just picked up my 2011 S4. It's got around 25k on the clock and received the typical dealer maintenance (Syntec 5w40 every 10k, etc). The day I bought it I ran a bottle of Redline SI-1 through, but I'm wondering if a follow-up dosage of Techron Concentrate or Regane (I have a few bottles) would be beneficial.
I have no clue what kind of gas the previous owner used, except that it was supposed to be 91+ each time. This motor is FSI (direct inject), by the way.
I have no clue what kind of gas the previous owner used, except that it was supposed to be 91+ each time. This motor is FSI (direct inject), by the way.