48.0 mpg. It was up to 49 IIRC but I've been driving up to the speed limit in recent years, though still trying to overcome the family reputation of being a "slow" driver! I often think about how my dad, back in the "good ol' days", was happy to get anything over 20 mpg on the highway with a 6 cylinder engine and manual transmission. I do use E0-87 gasoline almost exclusively, so that helps.