MPG inaccurate data or (something).

[OBO]

I own a 2019 G80 3.8L AWD. I have checked the car's odometer for accuracy twice using GPS. My car has a 1.87% odometer error. That Is when I drive 100.0 miles per the car's odometer, the actually miles driven is 101.87. I use the car mostly on longer trips and have measured the highway mileage on several trips and it generally has been averaging about 25 to 26 mpg corrected for the odometer error.

Im just gonna use the trip A counter route, how many miles I actually driven vs the miles it gives me to empty. But you’re getting the EPA hwy mpg so thats good

 

[OBO]

So many variables. Short trips in the city is in the 13 to 15 range. Cold even lower. We can't see your traffic so cannot really compare. Big city stop and go? Stop sign on every corner? You have a lot of weight to get moving no matter what mode you are in.

To get the 28-30 you mentioned you have to be going down hill with a tail wind. Most I ever got was 27.3 on a very long haul on cruise control,

I'd suggest getting some of that black electrical tape and cutting a piece about 3/4" square and placing it over the dash reading for mpg. You'll enjoy the car much more.

I understand i love the car. But damn haha. I find it quite interesting that our cars rwd/awd gets similar/ roughly mpg of that of a 2015-current dodge charger RT/scatpack v8s and those cars are heavier. Even the dodge charger v6 curb weight is roughly 4000 pounds and it gets better gas mileage slightly especially in the city. So its interesting with our cars , despite the 8 speed, even having eco mode as well.
And yes I try to avoid it by switching to my music counter. But then when i shut the car off its shows it again, range miles and mpg.

 

[Mr. Incredible]

I understand i love the car. But damn haha. I find it quite interesting that our cars rwd/awd gets similar/ roughly mpg of that of a 2015-current dodge charger RT/scatpack v8s and those cars are heavier. Even the dodge charger v6 curb weight is roughly 4000 pounds and it gets better gas mileage slightly especially in the city. So its interesting with our cars , despite the 8 speed, even having eco mode as well.
And yes I try to avoid it by switching to my music counter. But then when i shut the car off its shows it again, range miles and mpg.

Dodge/Chrysler and GM cars have cylinder deactivation, at speeds above 20mph with no load on the vehicle, especially cruising on the highway, the motor shuts down fuel to 4 cylinders. All the V8 models have it from the 5.7L - 6.4L Hemi and with GM everything above 5.3L has it in all vehicles with Auto Transmissions including Camaros and Corvettes (though I am not sure on the C8 vette, the C7 does have it).

If driven conservatively MDS (Multi-Displacement System) Engines will get better MPG than most V6 motors.

 

[OBO]

in eco mode taking it easy Then 0-40 takes 15 seconds or longer, if you are getting there faster your foot is to heavy, as a result your mpg will suffer. You are negating any savings. ECO mode is best used for cruising, but if you want to use it for city driving then you have to drive like a little old lady on Sunday, And annoy the hell out of everyone else on the road. Unfortunately the G80 doesn’t show throttle percentage, like some other cars I have had did, but anything above 10% throttle and you kill MPG.

I have a Sport with a 3.3T. Average 19mpg with a mix of highway/city. my commute from house to freeway is 7 miles, highway to work is 12 miles, freeway to office is 4 miles. My average speed is typically 45mph, figured by dividing the distance over the time 23 miles /50 minutes = .46 or 46 miles per hour.

I typically get 320-350 out of a fill up, with the fill being 17-18 gallons, 320/17 = 18.8 mpg.

The car computer says my average over the past 6 months since I reset it is 18.6. And in a typical fill up it tells me I will get 420 miles out of that tank which has NEVER happened with daily commuting, even when I ran the tank completely dry, I topped out at 370 miles 370/19 = 19.4

However I did manage 450 miles out of a tank with a fill up of 18.8 gallons when I drove from CA to TN last summer, which equates 25.2 mpg.

Yeah the throttle percentage would of been very to have , oh well. Using regular gas offsets the soso mpg

 

[OBO]

Dodge/Chrysler and GM cars have cylinder deactivation, at speeds above 20mph with no load on the vehicle, especially cruising on the highway, the motor shuts down fuel to 4 cylinders. All the V8 models have it from the 5.7L - 6.4L Hemi and with GM everything above 5.3L has it in all vehicles with Auto Transmissions including Camaros and Corvettes (though I am not sure on the C8 vette, the C7 does have it).

If driven conservatively MDS (Multi-Displacement System) Engines will get better MPG than most V6 motors.

Im aware of that, and that works on the city too with light to medium traffic ? I mean you interchanging between 8 cylinders to 4 , i get for hwy but city ? Though ?
Whats the narrative for the v6s because they do not come with MDS , but i have seen ppl getting a respectable 18-19 in the city like the EPA mentioned the car can achieved, and they weight about 4k pounds. Of course driving conservatively. Is the ZF 8 speed a better trans

 

[Mr. Incredible]

Im aware of that, and that works on the city too with light to medium traffic ? I mean you interchanging between 8 cylinders to 4 , i get for hwy but city ? Though ?
Whats the narrative for the v6s because they do not come with MDS , but i have seen ppl getting a respectable 18-19 in the city like the EPA mentioned the car can achieved, and they weight about 4k pounds. Of course driving conservatively. Is the ZF 8 speed a better trans

yeah the MDS system works above 20mph, I had a Chrysler 300cSRT and there was an ODBII tool you could plug in that would give you an MDS light and tell you when it was active, it also had throttle % at 40mph city driving it would come on and stay on light to light if I was driving conservatively, slow accel to 20mph then release gas pedal then reengage lightly would for it on and I could keep it on with throttle percent under 10.

As a Chrysler ASE tech and then Chrysler Corp Tech for nearly 20 years I can tell you the pre 2012 (when I left) V6 engines didn't get anywhere near 18mpg, 14-15mpg was the global average. Maybe since the technology is a bit better, but I would be hard pressed to believe that in the real world they have a city average of 18mpg.

again EPA estimates are done in perfect conditions. they are not real world averages.

with the 100+ vehicles I have owned in the past 35 years, my overall MPG has been 16-18 and most of my vehicles have been V8 motors, The G80 is only the 3rd non-V8 car I have ever owned.

Even my 1939 Ford, with a Chevy 350 crate motor gets 14-15mpg on average, and it only weighs 2,900 dry. 12 gallon tank 150 miles with a 10 gallon fill is the max on car, if I go too much over 150miles I'm walking to a gas station...

 

[OBO]

yeah the MDS system works above 20mph, I had a Chrysler 300cSRT and there was an ODBII tool you could plug in that would give you an MDS light and tell you when it was active, it also had throttle % at 40mph city driving it would come on and stay on light to light if I was driving conservatively, slow accel to 20mph then release gas pedal then reengage lightly would for it on and I could keep it on with throttle percent under 10.

As a Chrysler ASE tech and then Chrysler Corp Tech for nearly 20 years I can tell you the pre 2012 (when I left) V6 engines didn't get anywhere near 18mpg, 14-15mpg was the global average. Maybe since the technology is a bit better, but I would be hard pressed to believe that in the real world they have a city average of 18mpg.

again EPA estimates are done in perfect conditions. they are not real world averages.

with the 100+ vehicles I have owned in the past 35 years, my overall MPG has been 16-18 and most of my vehicles have been V8 motors, The G80 is only the 3rd non-V8 car I have ever owned.

Even my 1939 Ford, with a Chevy 350 crate motor gets 14-15mpg on average, and it only weighs 2,900 dry. 12 gallon tank 150 miles with a 10 gallon fill is the max on car, if I go too much over 150miles I'm walking to a gas station...

I almost bought the chrysler 300 S, until i did more research on the g80. The Chrysler 300 tends to develops problems .

So the main verdict is , if you really really want to save gas, you should get a N/A 4 cyl or turbo 4 cyl. With v6s & especially with our cars if you do 80%+ highway, you will definitely being in the mid 20s or higher, mpg, do 50/50 split you should be in high teens/ early 20s mpg. Mostly city early to mid teens mpg. The offset to the medicore gas is being able to put regular octane.