every time I see you post bro I think of the movie airplane lol
characters name was stryker for the dora crowd.
Well, every other MS3 owner, myself included, is noting considerably better gas mileage than you. It could just be your driving style though.
Not according to this thread.
Driving style should not matter on the interstate with cruise control.
Either way though, I've revisited the topic on several occasions because there are a lot of people who claim to get 30mpg with their ms3s, but then there are at least an equal amount of people who can't break 24-25mpg with theirs. I think some just run more rich than others for whatever reason. I blame the ECU.
I've done a lot of troubleshooting but have never been able to find anything physically wrong. No CELs and even paid the dealership to flash the ECU with the latest firmware and no difference in mileage.
I did used to get a lot worse mpg around town (14-15) until I changed out my spark plugs though.
I've changed the air filter and seafoamed the intake, put fuel injector cleaner in the gas and cleaned the MAF. Also replaced the O2 sensors. Don't think I am burning any oil. I cruise at 75mph.
I might try using 0w30 next oil change instead of 5w30. Dunno if worth the extra cost.
Also, I've tried messing with different octanes but there is no difference in mileage between 87, 89, or 93 octane (just decreased performance). I did find that curious though as the ECU is supposed to run more rich with 87 than 93. Seems like it runs just as rich with 93 as it does with 87.
My CAI improved fuel economy, after I could keep the right foot from having too much fun.
Yeah well that only makes sense...Hmm.. kind of odd there aren't consistant results. You'd suspect once you get an ECU flash, it would fix any software problems (maybe mazda ECU 1.2 was written to burn more rich by mistake and the flash to 1.2.1 fixes it). Some kind of mazda QA problem?? :-/
Possible I suppose, but I'm not sure. I'm fairly religious about using engine braking (and thus decel fuel cut) wherever possible, and I get 93 whenever I can because I've noticed fuel economy improvements with 93 over 91. Nothing less than premium should be run in the MS3 though... Shawn: putting 87 in the tank was a bad idea.
Seems like every MS3 owner in ATG gets 30+ on the interstate except for Shawn. Tires, tire pressure, and speed limits might have something to do with it? I don't know. Could have an intake leak...