Hello all,
I own a v6 tdi Touareg that is deleted and straight piped, no emissions in tact. I’ve since switched from a 507 to 505 approval oil, also from a 5w30 to 5w40. I was initially using Liqui moly Toptec 4200 and am now running Liqui moly Leichlauft. However after lots of reading online...