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2025 - Limited - MPG is lower than advertised?

8.9K views 58 replies 28 participants last post by  AndreaSandVar  
@HalBluzer Without knowing the situations you're driving in hard to say. If you live in a city with plenty of stop and go driving, ie 1 mile or less in between traffic lights as in New York City, I would NOT expect to get good MPG. And are the trips taken all less than 1-3 miles and then you park and shut off the vehicle? Short trips like that will cost you as well in terms of MPG. How much idling are you doing? Are you the driver that idles the vehicle so it completely warms up before you drive off? Or are you the driver that starts and goes? Are you the driver that floors the pedal as soon as the light turns green and keep it floored and then slam on the brake at the next red light?

So much we don't know about your driving situation.
 
@hatch, so it seems like you're looking at the instant display on the dash vs tank calculations to draw your conclusion? Would help if you did actual tank calculations and posted the results. It's not surprising that you're getting 26mpg at 70-80...that's normal, you're moving a brick through the air. The only vehicles that I know personally because I owned them that got better than 26mpg at those speeds were my 2 x 3.0L V6 Diesels(2011 VW Touareg TDI and 2014 ML 350 Bluetec) because they are very high torque engines and therefore only spun at 1500-1800 RPM at those speeds. And these 2 vehicles are larger and very much heavier bricks! ;)
 
EPA does not actually conduct the MPG tests. They're depending on the car makers to conduct the tests according to EPA guidelines. Look at the number of car makers that have gotten into trouble with false or inaccurate ratings. EPA ratings as stated are not always achieved by the average vehicle owners due to various conditions.
 
You're painting with a wide brush. Look where? Please provide specifics to support statement, such as numbers and percentages.
Google it yourself. Ford, Hyundai, etc...been in the newa for the last 10 years....Am I painting a wide brush when I state it's been in the news?


 
These are DI (Direct Injection) engines compared to the older Port Injection engines. They produce less wasted heat, more energy is directed at physically moving the vehicle. As such they take longer time to get up to operating temperature. So if you need to drive short trips, ie less than 3-5miles good luck getting good MPG. This includes trips to drop the kids off at school, you grocery store, etc...So what do car makers do (Not just Subaru), they program the ECU to always keep revs up and keep them up longer. Look at what happened to Honda's Dream Engine with the oil dilution....the re-programmed their ECU to rev the engines higher and longer....to the behest of the Honda owners...

This is one of the reasons why all my diesel vehicles had an electronic heating element....If the vehicles depended on using coolant to warm up the cabin, good luck, I would be driving around with no heat for at least 30 minutes on a 45 minute commute....It is also why there's a company out there that sold a retrofit heater that you spliced into the cooling system, so you could pre-heat the coolant and the cabin before you drove off. There are YT videos showing snow and ice being melted while the vehicle is sitting in the driveway and the engine is NOT running...
 
@bigbird1 True, but it is way worse for the DI engines compared to your port injection, which is why I provided the Honda example. The DI technology allows them to design the engine to much higher compression, higher compression means they generate more torque. And more torque means more energy is devoted to actually moving the vehicle.
 
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