Ok...I've been reading alot of posts about problems related to gas concerns and the performance issues after some have tried different grades (89,91,93 etc. oct.) and S.A.'s saying "your problems with your fuel...has anyone addressed the permanent fuel filter that BMW/Mini states" is permanent never needs replacing " because your going to develop crap in the filter and it needs to be changed at about 50-60,000 mi.I couldnt believe what was in my filter at 50.000 miles only using 93 Shell V-power.My '07 MCS runs soooo much smoother after replacement .How could Mini call it lifetime.After all who knows what they're adding to the tanks with prices at $$4.15 (Maryland Shell 93 V-power)and rising