Mine is a daily driver too. My first concern is safety. Trafic can be be very dicey, even unpredictable, especially in the snow and the rain. While I am concerned about mileage, I'm far more concerned about traction in close call situations which occur which happen with a certain regularity,about once every two years. Somebody pulls in front of me, goes through a red light, or wanders into my lane. And when this happens I need to brake and swerve to get out of harm's way. I see good tires as my best insurance policy. I want to keep my twenty three year old Ranger running indeinitely and invested accordingly.
I bought a set of oversized Coopers, a vast improvement over stock, especially in bad weather.
Mileage is my last concern. But it is a concern. I did all the tricks this forum recommends for my vulcan v6. I bought a KC filter, got an efan, installed a nice dual exhaust, sea foamed the engine, the oil, the injectors, and switched to synthetic oil.
I drive it pretty hard and love those four ten rear end jack rabbit starts. My mileage is about the same as when it was new.