Iv been putting V-power or the equivilant premium petrol into my 1.6 Leon since the day i got it a month or so back, but the other day i saw on the inside of the flip out cap it says 91/95 i m guessing this refferes to the octane of petrol does this mean i shouldnt put it in? I do feel like im getting pretty poor fuel efficancy 290miles to £53 (premium) fuel.... i thought your suppossed to get further on premium though? also i hear it sorta cleans you enhgine up a bit and keeps it cleaner.