Explain 10MPG drop on identical drive

[ehauser]

With nothing changed between drives other than a slight temperature change I noticed a 10MPG drop in performance today.

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[Mavman321]

An 8.4 mile trip is rather short to be comparing mpg numbers. With a trip that short minor changes in acceration, braking, and slower or faster traffic can really swing the average. I assume that's your work commute... I suggest driving it for a week and comparing results over a week.

 

[Lynyrd Skynyrd]

Too many factors. Same or different gas, driving habit, wind, braking idle time.
In general I’ve learned mavericks do not get best mileage in cold weather. On my 2.0 average was 26. Same commute for a cold week was 20

 

[ehauser]

Thing is it is usually pretty consistent. This is same day. No variables changed. Only 5 degrees warmer yet 10MPG worse. And better electric time yet worse mpg. That is what threw a red flag. Been driving this commute for 6 months.

 

[TE37Mav]

Thing is it is usually pretty consistent. This is same day. No variables changed. Only 5 degrees warmer yet 10MPG worse. And better electric time yet worse mpg. That is what threw a red flag. Been driving this commute for 6 months.

It’s a .5 mile less on electric only. The trip is short so small changes will change that mpg figure a lot. Wasting your time over thinking it

 

[Chris]

I think sometimes if you use the vehicle in the pre-start warm-up mode or if the temperature requires the engine to run more to maintain cab temperature that gets calculated into the mileage if someone knows better please comment I've experienced the same it's kind of scratched my head

 

[Raymundo76]

An 8.4 mile trip is rather short to be comparing mpg numbers. With a trip that short minor changes in acceration, braking, and slower or faster traffic can really swing the average. I assume that's your work commute... I suggest driving it for a week and comparing results over a week.

Right on!!

 

[710-oil-614]

1. As others have pointed 8 miles is far too short for an accurate comparison. That is roughly .15 - .2 gallons.

2. If it is driving from point A to B and then B to A it is possible you had a tailwind heading there and a headwind coming home or vice versa. Same with uphill vs. downhill.

For short trips like this in my 2022 CRV Hybrid I observed similarly large jumps in MPG

Simply not enough miles to draw any conclusions from unless you've been averaging 52mpg for months and then for the next few months you continue to see the 43 mpg.

 

[ehauser]

1. As others have pointed 8 miles is far too short for an accurate comparison. That is roughly .15 - .2 gallons.

2. If it is driving from point A to B and then B to A it is possible you had a tailwind heading there and a headwind coming home or vice versa. Same with uphill vs. downhill.

For short trips like this in my 2022 CRV Hybrid I observed similarly large jumps in MPG

Simply not enough miles to draw any conclusions from unless you've been averaging 52mpg for months and then for the next few months you continue to see the 43 mpg.

That was exactly the reason I posted this. I was consistently getting close to 50mpg on this drive for 6 months. In fact, the reason I took the photo of the first drive was it was 52mpg, the first time I broke the 50mpg barrier on this drive. Then I get 43mpg, and then this morning is was 38mpg so it is getting worse. I also noticed more shuttering than I ever have in the Maverick.

 

[Eagle11]

With nothing changed between drives other than a slight temperature change I noticed a 10MPG drop in performance today.

What is the Temp change? Here in PHX, the temp has dropped and I noticed the ICE is running more in morning then it has in the past and my MPG has dropped because of this. I'm sure by Mid Feb, when the weather warms up my MPG will go up again.

 

[taylor_]

There are so many factors that could swing your avg MPG over such a short window of analysis. Wind, how you drove, traffic, temp. Even just hitting the gas harder at one light would probably swing that average pretty strong if you are only using 8 driven miles to measure it.

 

[Waterick]

Your state of charge on HV battery going into this trip will also impact the MPG during the trip. The Maverick does not provide any SOC indication, so you really don't have much else to go on. Shuttering..I can only guess that that can't be good either. Anyone else have a clue about how the shuttering could impact MPG?

 

[ehauser]

What is the Temp change? Here in PHX, the temp has dropped and I noticed the ICE is running more in morning then it has in the past and my MPG has dropped because of this. I'm sure by Mid Feb, when the weather warms up my MPG will go up again.

It was 48 degrees on the 52mpg drive and 54 degrees on the 43mpg drive, same day. I have noticed around 38mpg when the temperature was around 0-10 degrees a couple weeks ago, but that is to be expected.

 

[Aherpa]

I only check mileage by doing the math at the pump, how many miles since the last fill up and how many gallons did it take.

I've had the MPG gauge tell me I got 999.9 MPG and as little as 20.5 MPG, but when I calculate MPG the old fashioned way, it has between 31 - 38MPG. The lower was during -10 degree weather and the engine was running a lot to keep the cabin warm.

Good luck.

 

[MakinDoForNow]

I only check mileage by doing the math at the pump, how many miles since the last fill up and how many gallons did it take.

I've had the MPG gauge tell me I got 999.9 MPG and as little as 20.5 MPG, but when I calculate MPG the old fashioned way, it has between 31 - 38MPG. The lower was during -10 degree weather and the engine was running a lot to keep the cabin warm.

Good luck.

The 999.9 is for a trip (short) in which the ice never starts.

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