I have a 2002 OBW..... The beginning gas mileage was 25.... The service people put the air cleaner shroud cover on wrong allowing some air to by-pass the filter and my mileage went to 30 for 3-months until another service tech found the air cleaner cover not secured properly. This is a common problem. Those who are getting 30 mpg may just have this problem. I liked the idea of getting 30 mpg so I purchased a K&N filter element and now I get a consistent 30 mpg with the air cleaner cover properly installed.
For what its worth I get around 8.5 litres/100Kms highway and 11.5
>litres/100Kms city in my H6 Outback MY03 using 98 octane unleaded. >
>This equates to 27.5mpg highway and 20.5mpg city using US gallons @
>3.785litres and 62.1 miles/100Kms.
>
>I think this is good for an auto 6 cylinder. A number of people in Oz
>are using the 98 octane unleaded now as it is only 10% dearer than 91
>octane and the fuel economy is better. Typically I get between 7-10%
>better economy than with standard 91 octane plus the added benefit of
>quicker response. The 98 octane as supplied by Shell here also has an
>injector cleaner included.
>
>Lance B