I'd say it's possible, but unlikely without discipline and attention to detail.
A lot of my friends are really impressed that I've been able to squeeze 30s and 31s out of a Mustang with an EPA combined estimate of 20 MPG. But most of them are not interested in trying to get better fuel economy with their own vehicles. The discipline and attention to detail are "too much trouble". A
lot of them don't even know what kind of fuel economy they're getting because logging their fuel consumption is "too much trouble". To some, driving the speed limit is "too much trouble".
To me, it's a fun challenge.
Once a co-worker asked me, "Why don't
all Mustangs get that kind of gas mileage?"
I said, " 'Cause I'm not drivin' 'em!"
I wish the OP the best of luck in improving his fuel economy.
On edit, the reason the fuel log for my truck only goes back to 2003, and not 1996 (when I bought it) was because adding all those fuel log entries seemed like "too much trouble".
