I had a '94 E 350 with the 460 and man, that is a good engine. I made a couple changes that improved the gas/distance but also really increased the power delivery.
I installed a Banks air breather system. No big deal in cost or parts. Plus went to a K&N air filter.
Then went to Red Line synthetic oil. This lets the engine run cooler.
I also switched to using a NAPA Gold oil filter. Larger..more capacity. Runs cleaner.
The biggest improvement came from switching to the Banks, everything else was a compliment to that.
Gary Haupt
