Hi! Can anyone help me with the question of whether it is (or isn't) a good idea to use 99 octane super unleaded in the VW
FSI and TSI family of engines? In 2003 and again in 2006 I purchased, new, a VW Polo 1.4FSI. I have used super unleaded exclusively in both cars (Shell Optimax originally; later Shell V-Power), the rationale being that a compression ratio of 12.0:1 would otherwise tend...