I was found out from fast lane that my car is a euro car that it wasnt built for the US was going to buy a catalytic converter from them it turns out it would not fit my car i have a 1 inlet 2 outlet converter but the one thy show in 2 in 2 out then he ask me a few question about my vin # then he told me my car was not made for the us now what do i do i know in Europe they grade they fuel differently now should i still use premium on the car or go with a lower grade any of you guys have a Euro car?tell me what u had to do please any info would be helpful