[aerobod]

There are lots of possibilities on what could cause a shift in fuel consumption, but often with a significant shift (>10%), it is a problem with closed loop Lambda operation not occurring during light and medium loads. So Lambda sensor contamination, exhaust flow changes to the sensors or wiring damage (although that should set a code), could be a problem.

[Ehloo]

i am more concentrated on the twice a week 250 mile drive. that some serious driving and wear and tear

for the amount you pay in gas wouldn’t something with better mpg serve you better. second commuter car