Sounds like pretty poor fuel mileage...though I do get 35 mpg if I do my usual 3-4 miles to work to and from and similar for lunch only...during working week. Out on the highway when I go to AZ or Northern CA for 500 miles essentially stopping only for gas, I get 47 mpg (carbureted Sportster) so your mileage will vary by at 10-12 mpg or so, so under 30 may be possible and "normal" as driving is a matter of how you drive MORE than any other single thing you can do. :s
Fuel Mileage - Harley Davidson Community
Fuel Mileage - Harley Davidson Community