The Under the Hood
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Dear Motor Medics, I have a 2004 Chevy Monte Carlo and I am hoping to get better fuel mileage out of it. I have had the car for two years and my dash gauge reads an average of 20 almost all the time.
When I bought the car the lot told me that they usually get about 30 mpg or so, but I have never had it that high. Once on vacation during a 2k mile trip, I did average about 26, that was it.
What can I do to make this car get the mileage that it should? So far all I have done is to put new spark plugs into it.
Thank you, Bill in Sioux City, Iowa Dear Bill, Well, there is a lot more to this than what appears.
First, having owned several of these and having many customers with these vehicles, we know them fairly well. Most of them, with the 3.8 non-supercharged engine, average around 23 mpg and sometimes on longer trips they can get around 26. Our own very well maintained 3.8 never got better than 26 on a trip.
Many factors play into mileage such as basic tune up items like spark plugs, air filters and even tire pressure.
Having the fuel system cleaned regularly is also something that plays a role in mileage.
It seems like your vehicle is running in line with what we have experienced but if you feel like it is low consult with your mechanic. Take care, The Motor Medics
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