Can you take a V6 3

Actually with all the work you would need to do to make that work it really would probably get worse gas mileage due to weigh tof vehicle. Put a vacuum gauge on it and use that as a guide, keepp it in econoomy range

Trucks traditionally don't get as good of mileage as cars do. I't because they waeigh more and have different gear ratios. If you drive on eway you shold have overdirve on. About the only ting you can do is drive in overdrive on eway or actually whenever you are above 50 mph. Replace filters like air and fuel onc year, and keepin good tune. You could try a tune up but don't expect much if anything. It's a truck and they aremade to haul loads, not like a car that isn't made to do thatespecially if you are going from something like a Honda Civic to a truck.