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50:50 city/highway can’t make it above 20mpg yet…. I haven’t had a chance to do an extended trip so I’m looking forward to seeing those numbers somewhere north of 20 in the future.
50:50 city/highway can’t make it above 20mpg yet…. I haven’t had a chance to do an extended trip so I’m looking forward to seeing those numbers somewhere north of 20 in the future.
dumb question, but how can you see the MPG you're getting?
On the main dash screen one of the option shows you your accumulated mpg after starting the car and another after a longer period. If you tap down on the trip odometer section.
Sorry to resurrect this thread, but I figured it's better than starting a new one.
I'm maxing out at around 22 mpg (per the dash display) with mostly freeway driving. This is going an average of maybe 70-75 mph, maybe a little faster in some stretches. This is for a 2010 E550 Coupe. This is noticeably worse than my 2008 CLK550 (same exact engine and transmission, only very slightly lighter car) which got 25-26 mpg for the same type of driving.
Given that my CLK did so much better, I wonder if there's an issue with my E550? Maybe wheel bearings or something? Kind of odd.
22 seems reasonable to me. You can't trust the dash btw, gotta measure actual gas used. I've been measuring each tank for like six months to get an avg because it usually varies ~5% each tank, but sometimes more than 10%. A couple weeks ago it was 14.5%.
The dash on my car doesn't measure the gas used, but seems to be estimating by using engine load. I'd imagine if something was wrong and it was using more gas, but same load, it wouldn't see that. Whatever the deal, my experience with any car with a dash readout is it's just a guesstimate that can be anywhere from very close to very wrong.
22 seems reasonable to me. You can't trust the dash btw, gotta measure actual gas used. I've been measuring each tank for like six months to get an avg because it usually varies ~5% each tank, but sometimes more than 10%. A couple weeks ago it was 14.5%.
The dash on my car doesn't measure the gas used, but seems to be estimating by using engine load. I'd imagine if something was wrong and it was using more gas, but same load, it wouldn't see that. Whatever the deal, my experience with any car with a dash readout is it's just a guesstimate that can be anywhere from very close to very wrong.
Yeah, it seems somewhat reasonable, and I know the dash can't be trusted entirely. But I was comparing the dash calculations of the CLK550 to the E550, which I would assume are using the same/similar means of calculation. And based on that, the E550 seems to do 3-4 mpg worse than the CLK despite being an extremely similar car. Oh well, I guess it is what it is unless some deficiency is found.
the point was basically the one might be reading better than the other. id imagine the e weighs a good bit more, and aerodynamics, tires and pressure, alignment, gearing and who knows what else is different.
Now that I burnt through my first tank of pump gas (E10) in a while, my actual mpg was 20.07 and the dash read ~23.5 to a high of 25.9, so I guess 24.5 avg?
So on pump gas the dash is reading ~22% high. Not sure how much longer I'll run pump gas but I will track it if I do. My usual of ~50% Ethanol the dash reads ~45% high.
The live reading is even worse, I believe, because if I do find a rare stretch of flat ground it reads ~30. There are basically no flat spots where I live so flat to me is some fraction of a degree up/down, but that fraction of a degree makes a big difference in the reading. I've used GPS to see how flat my nearest flat spot is, but gps is worse at elevation than my dash is at mpg, so I guess I'll never know what the angle is.
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