You cannot go by the Trip Computer mpg, it is not that accurate.My 2022 Preferred (non-turbo) was getting around 30 mpg highway when I first got it, but now (6k miles) after an dealer oil change it dropped to 28 mpg per the dash. Not sure why, not driving it different either and tires are properly inflated. Still, fun car to drive though a turbo would have been a nice sporty thing to have, but it would have cost me about $4k more at the time I bought the car.
so far my hand calculated has been better than the computer on every fill up. Never had a vehicle do that before. usually the computer is optimistic but I hand figure every fillup and so far always better than the computer shows.You cannot go by the Trip Computer mpg, it is not that accurate.
Maybe this is where I am going wrong. The number I am posting is from the dash. At about 8k right now on "Trip B" and its under 24MPG.You cannot go by the Trip Computer mpg, it is not that accurate.
You cannot go by the Trip Computer mpg, it is not that accurate.
If I were to guess, I'd say your 30mpg was over a longer period and something was reset with the "dealer oil change" visit and your 28mpg is since that reset happened. May take some time to climb back up. Colder temperatures takes more energy to make things move....was getting around 30 mpg highway when I first got it, but now (6k miles) after an dealer oil change it dropped to 28 mpg per the dash. Not sure why, ...
You cannot go by the Trip Computer mpg, it is not that accurate.
dividing actual miles driven by actual gallons of gas put in the car. My computer might show 26 mpg but actual miles driven divided by actual gallons will show 29mpgNot accurate? As compared to what?
Well, maybe your 'fairly accurate' is different from mine.In my case, I have found all of my Mazdas' trip computers to be fairly accurate when compared to pen and paper math calculations from miles traveled and pump gallons purchased over thousands of miles (not individual fill-ups). IMHO.
ditto I reset my A trip every fill up and the computer has always shown less than hand figured. I have hand figured 99.9% of every fill up I have done since the 70's. I just do it out of habit.Well, maybe your 'fairly accurate' is different from mine.
We have three Mazdas amd two other maker's cars. I'm kinda anal and we keep written records of miles/gas/calculated and trip computer mpg - resetting the trip mpg at each 'full' fuelup. Although the trip computer's accuracies are "OK", they all vary by up to +-3mpg from calculated refill measurements.
I reste the A trip and yes the computer recalculates but it still is lower than what I get dividing miles drive ie the A trip by actual gallons pumped in. for some people close is fine but I like to know exactly not nearly we are all wired differently tho.Just reset the Trip A counter at every fill-up. It should also reset the mpg meter
if you're that meticulous about it, you also have to use the same gas pump every time and stop pumping the first time it clicks off. on my Mazda 6 the counter is usually .5-1 mpg off from the manual countI reste the A trip and yes the computer recalculates but it still is lower than what I get dividing miles drive ie the A trip by actual gallons pumped in. for some people close is fine but I like to know exactly not nearly we are all wired differently tho.
I use the TFL way of pumping gas have been doing it that way for 50 or so years and unless I am traveling, I generally get fuel at the same station and usually the same pump most of the time. I would same I am pretty close to being as accurate and reliable with the same fill level as possible. What I can say is every single fill up and I usually only fill up when I am at a 1/4 tank or so unless I am traveling then I let it go almost to empty. My hand figured numbers are better than the cars computer is showing and on all my other vehicles it has always been the other way. I do agree one or two fill ups will never tell you the story but multiple fill ups over time will. I put over 30,000 miles a year on so lots of fill upsif you're that meticulous about it, you also have to use the same gas pump every time and stop pumping the first time it clicks off. on my Mazda 6 the counter is usually .5-1 mpg off from the manual count
It's just funny (odd funny) to me that folks discount the precise fuel metering measurements of the ecu in favor of the imprecise multiple variables of a single tank fill.