Never braked from San Jose to palo alto with 55~65mph and end up with only 42MPG?

[Fozziekyu]

Hi everyone, I finally decided to register an account and ask questions

I am a uber driver in Bay Area with my 2015 mitsubishi mirage current at 48000mi

I noticed it seems my MPG are lower then everyone else in here, when I doing uber with combined city/freeway ,I got only 32~35MPG

and I tried San Jose to palo alto with 55~65mph with lightfoot and no never braked ,but it endup with only 42mpg, I also noticed if I go 70~75mpg, it will drop MPG to as low as 35, very sensitive
to wind resistance

it seems so low to me, I saw post in here people could reach ~50mpg in this situation

I am trying to find out whats the cause of this , I feel I lose some MPG after replaced my tire from original to federal 165/65r14, could that be reason?


Thanks

[Top_Fuel]

...I feel I lose some MPG after replaced my tire from original to federal 165/65r14, could that be reason?

The different tires could be part of the explanation.

Nothing has less rolling resistance than a worn out Low Rolling Resistance (LRR) tire. So at the point your original tires needed to be replaced, they were actually producing the least amount of rolling resistance...and the highest fuel mileage.

Even if you replaced them with the original style of tire, you would see a slight drop in mileage because the new tires have more tread (and more rolling resistance). You installed new tires...but you also changed to tires that were not low rolling resistance.

So from a tire standpoint, you went from the least rolling resistance (a worn out LRR tire) to the most resistance (a new non-LRR tire). In real terms...that one change might have cost you as much as 3-4 mpg.

...I tried San Jose to palo alto with 55~65mph with lightfoot and never braked ,but it endup with only 42mpg, I also noticed if I go 70~75mpg, it will drop MPG to as low as 35, very sensitive

There are lots of variables involved. And you are right...this car is sensitive to certain changes in driving conditions. I'll toss out a few ideas...

Is that a drive with a lot of hills? If so, that could account for some of it. This car doesn't like to climb hills. If you were climbing hills with the cruise control on, that would be even worse.

Were you running the air conditioning? That really kills your mileage.

70-75mph? Forget about it...that's a mileage killer, too. The good mileage starts to fade above 60mph.

Do you have a CVT or a 5-speed? The 5-speed is going to be slightly better for fuel mileage.

Have the temperatures been cooler than usual out there? If so, that can also reduce your mileage.

Are you Ubering around with 3 400-pound passengers?

[Fozziekyu]

I got a CVT... when I go from San Jose to Palo alto it seems to be totally flat for me, no hills

AC is on but cooler(snow icon) is off,so I assume compresser is off... and it was just me in a empty car


what's strange was when my car before 38000mi, I normally check MPG and its always about 41, so I haven't check it for a long time until I changed my tire(happened at 43000mi), it seems I lost a lot of MPG, maybe engine is worn out and getting older as well? I did not treat my mirage too good, cheap oil change from Walmat, cheap gas from circle K and 711...

doing Uber with a small gas tank making me fill my gas twice a day

[inuvik]

I got a CVT... when I go from San Jose to Palo alto it seems to be totally flat for me, no hills

AC is on but cooler(snow icon) is off,so I assume compresser is off... and it was just me in a empty car


what's strange was when my car before 38000mi, I normally check MPG and its always about 41, so I haven't check it for a long time until I changed my tire(happened at 43000mi), it seems I lost a lot of MPG, maybe engine is worn out and getting older as well? I did not treat my mirage too good, cheap oil change from Walmat, cheap gas from circle K and 711...

doing Uber with a small gas tank making me fill my gas twice a day

You don’t have that many miles on your Mirage and a cheap oil change from Walmart is fine as long as they aren’t using the cheapy Fram filter with the cardboard innards. Have you ran a bottle of Techron through your Mirage? Wallyworld sells it.

[Fozziekyu]

You don’t have that many miles on your Mirage and a cheap oil change from Walmart is fine as long as they aren’t using the cheapy Fram filter with the cardboard innards. Have you ran a bottle of Techron through your Mirage? Wallyworld sells it.

never used products like that, I will check it out, thanks

how do you make fuel logs? my Mirage got only "A", and it reset by itself, did you make someting to post MPG logs automatically?

[inuvik]

never used products like that, I will check it out, thanks

We’ve had a few members that have reported better drivability after running a bottle of Techron through. It doesn’t have to be Techron but it should not be the cheapo DollarTree variety. I think a 12 Oz bottle of Techron runs about $8-10 US.

[MetroMPG]

my Mirage got only "A", and it reset by itself

All Mirages have 2 MPG gauges, A and B.

"A" resets automatically after 4 hours of inactivity.

"B" is driver-resettable. Good for tracking your tank MPG.

SEE:

Your Mirage has TWO fuel economy MPG gauges, (A & B) in the multi information display

[Dirk Diggler]

I drive Uber too. How the hell you having to fill up twice in a day? You doing the full 12 hours? I do an 8 hour shift, anywhere from 150 to 200 miles a shift and still got half a tank of gas. What's gas prices out in Commiefornia? $4.50 a gallon? You dropping $80 a day in fuel? I hope your pay per mile is good. It's crap out here in Atlanta, but I pay $2.14 a gallon for gas.

[Pryme]

I got a CVT... when I go from San Jose to Palo alto it seems to be totally flat for me, no hills

AC is on but cooler(snow icon) is off,so I assume compresser is off... and it was just me in a empty car


what's strange was when my car before 38000mi, I normally check MPG and its always about 41, so I haven't check it for a long time until I changed my tire(happened at 43000mi), it seems I lost a lot of MPG, maybe engine is worn out and getting older as well? I did not treat my mirage too good, cheap oil change from Walmat, cheap gas from circle K and 711...

doing Uber with a small gas tank making me fill my gas twice a day

No one else touched on this but you're using the AC, it will cut down your mileage. The compressor cycles on and off to meet the demand of the temp you have it set to vs outside conditions. Nothing on your dash will tell you if the compressor is on or off. If your ac is on, you're going to reduce mileage.

[highwire]

The different tires could be part of the explanation.

Nothing has less rolling resistance than a worn out Low Rolling Resistance (LRR) tire. So at the point your original tires needed to be replaced, they were actually producing the least amount of rolling resistance...and the highest fuel mileage.

Even if you replaced them with the original style of tire, you would see a slight drop in mileage because the new tires have more tread (and more rolling resistance). You installed new tires...but you also changed to tires that were not low rolling resistance.

So from a tire standpoint, you went from the least rolling resistance (a worn out LRR tire) to the most resistance (a new non-LRR tire). In real terms...that one change might have cost you as much as 3-4 mpg.



There are lots of variables involved. And you are right...this car is sensitive to certain changes in driving conditions. I'll toss out a few ideas...

Is that a drive with a lot of hills? If so, that could account for some of it. This car doesn't like to climb hills. If you were climbing hills with the cruise control on, that would be even worse.

Were you running the air conditioning? That really kills your mileage.

70-75mph? Forget about it...that's a mileage killer, too. The good mileage starts to fade above 60mph.

Do you have a CVT or a 5-speed? The 5-speed is going to be slightly better for fuel mileage.

Have the temperatures been cooler than usual out there? If so, that can also reduce your mileage.

Are you Ubering around with 3 400-pound passengers?

The weight limit for passengers is 892lbs (3 passengers and 1 driver averaging 200lbs each with 92lbs of cargo).
2019 Mitsubishi Mirage weight by trims Curb weight Gross weight Payload Capacity
[43096] ES 4dr Hatchback 2018 lbs. 2910 lbs. 892 lbs.
https://autotk.com/weight/mitsubishi/mirage/#2019
The user manual has some slightly different ways of reaching that limit, I recall.

I also recommend checking the tires. I am looking for an accurate guage though, because my pen sized one seems to require multiple tests, and i lose air everytime I test it. I would like to put air in it so it will be good for three months. Estimating it will lose 1 PSI per month. But Is there any risk in having more air on one tire compared to another one?

Using brakes are just as important as not using them, but also driving slower is less wear and tear on the brakes because they won't be needed as much. https://www.topgear.com.ph/features/...brakes-adv-con