Good question. Part is on car setup, design and part is driving style.
First off does your car use 100% gasoline or flex fuel/ ethanol? Ethanol gives less btu and mpg than gasoline.
Do you drive on the highway a lot of city stop n go?
Basically you want to make the car roll better with less energy and less waste. Check the car over first, tire psi, alignment. Check your use of the engine. Do you warm up the car or just jump in and go? Do you drive a lot of short trips or one long trip? Do you like to make left or right turns? What side of the road do you drive on in your country? In America we drive on the right and many lights let you turn right even if its red saving gas.
When you go ff for multiple stops do you go to the furthest one first, then the shorter ones on the way back?
Thanks for the information am from the Caribbean not sure about the mix of gasoline, but I mostly make a lot of short runs rarely hit the highway.
I cleaned my throttle body, my egr, my injectors and changed my air filter but my mpg is still poor
Need to know what year your car is and how many miles in order to help determine best tuneup list. Could be time for new spark plugs and/or wires but without knowing the age and miles can't say for sure.
Short trips are a killer for mpg. I had a honda insight hybrid and when I was unemployed I made lots of short trips. I was averaging 12 mpg on a car with epa of 40/43 and when I had a job I averaged 60+ mpg.
Yeah if it has not had new spark plugs yet then its probably due for those, not sure what plugs they used in your 2006 sometimes they are good for a few thousand more miles than where yours are at but in an inexpensive car they are probably not high quality iridium (could be wrong tho). It may also be time for spark plug wires. You could test the wires but if they are cheap I would just replace them. (Wait, do these cars even have spark plug wires or are they coil-on-plug? I don't know enough specifics about the versa to be giving very good advice...)
There could be many other things causing poor mileage, unfortunately. Didn't some of the early versas have issues with fuel pressure regulators going out of spec or am I imagining that? If you have the ability to check fuel pressure that could be a good thing to do, or just change the fuel pressure regulator to be on the safe side if its cheap and you are digging around in there anyways. Thats the type of person I am, I just start replacing stuff like mad usually on more of a "well this COULD be worn out" basis than whether or not it is actually worn out... Sometimes parts are cheap and its easy to do. Sometimes it shoots you in the foot though replacing a 3/4 worn factory part with aftermarket junk results in a failure shortly down the road. I replaced the starter solenoid on my truck with 180,000 miles just because I figured it would fail soon, well the new aftermarket one failed within a couple weeks but who can afford all OEM parts?
Anywho what else... well of course make sure your tire pressure isn't low... beyond that I guess it might be good to go on a little highway trip and see if the mileage is good on the open road. If it gets OK mileage on the highway then you pretty much know it is purely the short trips that are killing your mileage.
Thanks bro I changed spark plugs at 80000km 🤔 maybe it's time to change it again lol. Also I would check my coil packs. And am starting to believe it's the short runs that are adversely affecting my mileage
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