Small block gas mileage DD magnum/LA ?
I’ve heard the 5.9 is tough on fuel though.
I just did my first gas mileage test a few weeks ago.
'68 Dart, 5.9 Magnum, stock bottom end, edelbrock airgap, edelbrock 1406, Doug's headers, dual 2-1/2" exhaust. Stock mopar electronic ignition, A500/42RH trans, 3:23 gears, 225/60/15 tires.
Also, I'm at about 5300ft elevation.
Filled it up and drove to work all week (40 mile round trip), I'd say 3/4 highway driving using the overdrive as much as possible, 1/4 in town.
I got barely 15mpg out of it. Was hoping it would be a little better, but the 42RH is still the best thing I ever did to the car. Cruising rpm's on the highway is just way more comfortable than with the old 904. If I remember right 65mph is like 2200rpm with the overdrive and lockup on.
