Hi scotty I have been watching your videos i am from Pennsylvania I have a question about my mazda3 2008 sedan bought it over 7months has over 206k miles on it bought it with 194k I use it for uber so I do alot of driving I have been keeping good maintenance on it change sparkplug oil air filter you name it but I have been noticing a poor gas milage I use to get a little over 320 miles with a full tank but now I am only getting no more than 210 miles a tank I have tried different gas additives different gas stations and different grades I even put high octane and it drank it as fast as a regular gas I have hit a dead end the car does not have any symptoms runs and drives great but can't figure out the poor gas milage the only think I have not done is the fuel filter I am going to do that soon to see but do u have any suggestions?
This is a common question. A search on this Forum yields one of the links below. Try those and see if it improves:
https://carkiller.com/scottykilmer/qa/why-does-my-civic-get-bad-gas-mileage/#post-49077
Does the different mileage per tank apply to the SAME kind of driving? Very often, cars get astonishingly bad mileage when in taxi/Uber service - short runs, heavy traffic, lots of idling/waiting. If you have a chance, do a careful measurement of a non-work trip like you used to do before the COVID.
I've been getting TERRIBLE mileage on my Matrix, but that's because I'm only doing 1 or 2 mile trips because I'm not commuting, traveling, visiting friends/relatives and all those other fun things, Of course, it took from March to October to use that tank of gas ( motorcycle season!)
