I know this has been discussed before. Just want to share my recent experience.My E90 has been on Petronas RON 95 since I collected my car [new] April last year.The cost/mileage is about RM0.19 to RM0.21 on highway and city driving.I could not find any Petronas on Penang Island last week and had to put in Shell RON95.The mileage turns out to be RM0.15 [from Penang to KL], which is a lot better.I just pumped in a full tank today to double check on the numbers. The full tank capacity is 760 kms - you guys on E90 get the same numbers?Thanks!