Miles vs. Hours - Kia Niro Forum
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post #1 of 17 (permalink) Old 05-02-2019, 06:46 PM Thread Starter
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Miles vs. Hours

A while back, there was a discusdion about oil change interval and the topic of EV miles vs ICE miles came up. I stated that I would buy an hour meter and report back.

Installed hour meter 4/13/2019 with 33,281 miles on my odometer. Since then, I hit 1000 today, 1016 exactly on 5/2/2019. The hour meter shows 15.1 hours. My trip meter B which I have never reset, shows 46 MPH average since new.

Doing the math, here are my numbers:
1016 miles in 19 days
1016 miles @ 46 MPH = 22.1 total run time.
22.1 hours total - 15.1 ICE = 7.0 EV.
15.1 is 68% of 22.1, which is 690 miles ICE
7.0 is 32% of 22.1, which is 326 miles EV

So, a 7500 mile oil change is just about 5100 miles on the oil. Guess Kia had that figured pretty good!
At 10000 miles, the oil would only be 6900 miles old.

P.S. The meter is a single wire wrapped around a spark plug lead and a piece of 2-sided tape and only cost $10.
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post #2 of 17 (permalink) Old 05-02-2019, 08:17 PM
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Quote:
Originally Posted by Griswald View Post
A while back, there was a discusdion about oil change interval and the topic of EV miles vs ICE miles came up. I stated that I would buy an hour meter and report back.

Installed hour meter 4/13/2019 with 33,281 miles on my odometer. Since then, I hit 1000 today, 1016 exactly on 5/2/2019. The hour meter shows 15.1 hours. My trip meter B which I have never reset, shows 46 MPH average since new.

Doing the math, here are my numbers:
1016 miles in 19 days
1016 miles @ 46 MPH = 22.1 total run time.
22.1 hours total - 15.1 ICE = 7.0 EV.
15.1 is 68% of 22.1, which is 690 miles ICE
7.0 is 32% of 22.1, which is 326 miles EV

So, a 7500 mile oil change is just about 5100 miles on the oil. Guess Kia had that figured pretty good!
At 10000 miles, the oil would only be 6900 miles old.

P.S. The meter is a single wire wrapped around a spark plug lead and a piece of 2-sided tape and only cost $10.
thx, for $10 I might get one.

Until then, I'm tracking my gas purchases and multiplying by 45mpg to estimate ICE miles.

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post #3 of 17 (permalink) Old 07-05-2019, 11:07 AM Thread Starter
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Update at nearly 5000 miles
Total miles = 4991
Total hours = 73.4
4991 miles at 46 mph average = 108.5 total running hours
108.5 - 73.4 = 35.1 hours on battery
3376.4 miles on gasoline
1614.6 miles on battery

67.65% ICE and 32.35% battery

Overall percentages on ICE have gone up a tiny bit possibly due to the unbearably long stretches of 100+ degree days using the air conditioning.

Still the best $10 you can spend.
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Last edited by Griswald; 07-05-2019 at 11:10 AM.
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post #4 of 17 (permalink) Old 07-05-2019, 12:32 PM
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Do you have a link to the meter you bought?
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post #5 of 17 (permalink) Old 07-05-2019, 01:48 PM Thread Starter
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Its called DiscoGoods waterproof digital lcd inductive marine motorcycle ATV snowmobile marine boat hour meter.

Its $9.99 on Amazon now, it was $9.86 when I bought it.
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post #6 of 17 (permalink) Old 07-05-2019, 03:20 PM
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Here's a link: https://www.amazon.com/discoGoods-Wa.../dp/B01LXRVC1I

Note that while it doesn't require a power connection to the car, it does contain CR2032 battery with an expected life of two years. One reviewer states the battery isn't replaceable, but that would seem odd. I don't know why they would tell you the type of battery if it weren't replaceable. No idea either if the meter resets to zero when the battery is replaced.

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post #7 of 17 (permalink) Old 07-07-2019, 10:54 AM Thread Starter
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I guess for $5 a year, the battery doesn't really concern me. If it dies, I'll just buy another one.
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post #8 of 17 (permalink) Old 07-07-2019, 01:46 PM
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Something is wrong here. My HEV is not in EV one third of the time. I don't have that documented, just simple observation of the displays. In addition, it is not logical. Regen recovery and use of that recovered energy tops out at 15%. How much of your trip is even slowing or going down a hill fast enough to be in regen mode? Then only 15% of that is useable.

To be in EV mode a full one third of the time would require a lot of charging by engine of the battery - which is inefficient versus simple engine direct propulsion. Further, a lot of the battery power goes towards assisting the engine on uphills or acceleration needs per flowchart display. Hard to imagine there is still enough EV power to have the engine off one third of the time.

Looking at the Amazon reviews, there were some hints of possible issues. One is adding wire length. Another is not having enough loops around the spark plug wire. Either one could result in intermittent loss of signal.

I might be wrong here, especially if all of your hybrid use is in the city with constant slowing (engine off) and accelerating/constant speed (some of which will be EV). But it just doesn't seem possible in my own use in mixed highway/city driving.

I've never read of the Niro having cylinder deactivation (usually on engines with at least 6 cylinders) so that is probably not relevant.

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post #9 of 17 (permalink) Old 07-08-2019, 12:42 AM
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Originally Posted by yticolev View Post
Something is wrong here. My HEV is not in EV one third of the time. I don't have that documented, just simple observation of the displays. In addition, it is not logical. Regen recovery and use of that recovered energy tops out at 15%. How much of your trip is even slowing or going down a hill fast enough to be in regen mode? Then only 15% of that is useable.

To be in EV mode a full one third of the time would require a lot of charging by engine of the battery - which is inefficient versus simple engine direct propulsion. Further, a lot of the battery power goes towards assisting the engine on uphills or acceleration needs per flowchart display. Hard to imagine there is still enough EV power to have the engine off one third of the time.

Looking at the Amazon reviews, there were some hints of possible issues. One is adding wire length. Another is not having enough loops around the spark plug wire. Either one could result in intermittent loss of signal.

I might be wrong here, especially if all of your hybrid use is in the city with constant slowing (engine off) and accelerating/constant speed (some of which will be EV). But it just doesn't seem possible in my own use in mixed highway/city driving.

I've never read of the Niro having cylinder deactivation (usually on engines with at least 6 cylinders) so that is probably not relevant.
I think a round trip to higher elevation and back could show 50% ev could it not? Ice up, motor down.

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post #10 of 17 (permalink) Old 07-08-2019, 12:55 PM Thread Starter
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Nowhere in this discussion did the possibility of both EV and ICE running together or regen actions come up.

All the meter can tell is that the ICE is ON or OFF. And, YES, I did install it per the directions, 5 or 6 turns around the COP HT lead and no extension of the wire. I have no reason to believe that the meter is not accurate.

This exercise only tells me how long the ICE is running and nothing else. All of the math is based on my driving style and historical records.

P.S. I drive between 60 and 100 miles a day on a 4 lane limited access highway with my cruise control set to 61 or 62 (which for this crappy cruise control can be anywhere between 59 and 65). I would say 90% is highway and 10% is city.
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