340/372 whatever it takes.......ala Mr. Mom :toothy7:
All joking aside Tony, even at 372 cubes; with the proper components and a tuning that synchronizes everything to its full potential, I believe you can increase your MPG by 50% or more. Even on my 500 c.i. engine the vacuum advance added over 2 mpg. When it was first set up I used a vacuum advance, but when I had a performance tune up done by a local racer, he set up the car to run solely with a mechanical advance. Immediately I recognized I had lost 2-3 mpg while cruising around town. Needless to say I switched it back to vacuum advance and I added a vacuum gauge too, which I monitor while driving. It is real easy to drop to 5 mpg with my car when my foot is in the throttle. When it comes to mpg's, one thing is to modify the way you drive your car and a vacuum gauge will help a lot. I realize you probably don't want to start tearing your car apart and changing everything but you might try some of the more non-invasive and inexpensive recommendations that have been made in this thread. I think you'll see positive results.