27-11-2010, 09:06am
I only put 98 in my bike & car (where available).....we get better mileage in the car with 98 over 91 (bog standard Subaru Liberty).....although haven't crunched the numbers regarding kms per dollar, so not sure if it's more economical to use 98 but getting about 100kms per tank more using 98 octane.