Could be the mechanic set the throttle control too high, so your car idles at a higher RPM than it used to. Timing was set wrong. your car should be better after a tune, perhaps the tuner made a mistake or did not do the tune correctly
Drop in fuel mpg Drop in performance
Yes, you can increase it with tune-ups and by upgrading the engine.
Tune it up. If its A car you can hope for around 18 MPG If its A truck you can hope for around 14 MPG
EPA estimations are 18 MPG in cities and 28 MPG for highways. However, you can pretty safely expect slightly lower values in reality, around 15 MPG in cities and 23 MPG on highways. The overall MPG is slightly lower than the average compared to other V8 engines.
The city mpg is lower than the highway mpg because driving in the city involves more frequent stops and starts, which requires more energy and fuel consumption compared to driving on the highway at a consistent speed.
That depends on the engine, mostly. No matter which option, it wasn't good by today's standards. My 289 2bbl was around 10 mpg before I did a tune up. Now it gets 16 -18 mpg.
The distance you can travel on a full 20-gallon tank of gas depends on your vehicle's fuel efficiency, typically measured in miles per gallon (MPG). For example, if your vehicle averages 25 MPG, you can expect to drive about 500 miles on a full tank (20 gallons x 25 MPG). Conversely, if your vehicle averages 15 MPG, you would cover roughly 300 miles. Always check your vehicle's specific MPG for a more accurate estimate.
14-17.5mpg w/90,000 miles on it and a fresh tune up
Full tune up will certainly improve gas mileage. plugs, wires, cap/rotor(if DIS, then doesn't have), fuel filter, air filter, pcv valve to name a few.
Accelerating and braking abruptly, an out-of-tune engine, under-inflated tires, to name a few.
With a DP1600 engine 19-21 mpg on a 009 distributor, with an SVDA distributor 25-27 mpg. Assuming correct carburetor, and good state of tune.
Probably, but I wouldn't try that. It may overload the Metro's tiny electrical system if it is a first generation model 1988-1994. Plus, it would lower your MPG on such a high MPG car.