I would leave it as is. You have a free extended warranty.

 

It works to your favor since it logs less mileage; it will have a higher reale value

 

Did you check your tire pressures before the trip? That can alter mileage, although it's typically the other way, so you might have your tires overinflated. But since your odometer is showing LESS miles than actual, you're actually getting an extended warranty indeed, so that wouldn't bother me one bit .

 

The Calligraphy has the 20" wheels vs the Limited which I believe may be 18/19". Wouldn't that make a difference ??

 

No. They account for that when calibrating the car at the factory.

 

Can be the other way around too. Was the 2020 showing the incorrect mileage? It’s a trip I make to a second home at least 20 times a year. Mileage was always exactly 195 door to door with the 2020

 

On my Gen Coupe I had to put on 1" taller tires to get the speedo to read correct. Odo is still off by 5%.

 

2% boy some people are fussy. You need to do it at least 10 times and take an average to make a better assessment. You probably turned the steering a tad more on the trip in the older car. Speedo's are allowed to read fast by quiet a bit but odometers I don't know because I don't think there is a design rule to cover them.

 

I have done the trip at least 10 times in the new car and it’s the same. Fussy? No I’m not fussy. I think it’s a legitimate question that I threw out to the community. I think pretty much exactly 195 miles over 3 years and suddenly 190 leaves room for questioning

 

On most of my vehicles, the speedos have been a bit optimistic in the past, but odometers have always been dead on. But if anything, manufacturers err on the pessimistic side on odometers, since even 1 mile robbed out of the warranty, could trigger a lawsuit in this country . But lately, even the speedos are dead on (against radar on streets).

 

But lately, even the speedos are dead on (against radar on streets).

How would you know this? Without looking up the latest design rules ( I assume the US uses the Euro standard) they are in most cases reading faster than the car is going but they cannot read slower. I don't know US law but here the manufacturer is in a corner when it comes to warranty claims and we have a lovely legal point that any product must last the expected life of the product. Saying that if a product you buy has a 12 month warranty and expected life of 5 years the 5 years applies to the real warranty. I just love consumer law.

 

In the USA most of us confirm our speedo accuracy with our GPS or the in-town or highway roadside "radars". Seldom deviates more than the rounding error of our speedo, GPS, or the "radar".

 

Have you considered your reference may be incorrect, or both, but consistant? Even Google can be incorect or use a different route.

 

What does Google have to do with. I just referenced them for a ball park figure of the mileage. Still does not explain why one car is 195 and the other is 190.

 

I would also go with tire circumference/size. But have to admit I would never notice the mileage difference and wouldn't bother me a bit if I did.

 

I would think if it has the factory installed tires it’s calibrated correctly. While I’m not upset about the mileage difference I’m a very science oriented person and curious as to why there would be a 5 miles difference over 200 miles travelled. Maybe both cars aren’t exact, I dont know but a 5 miles difference seems a bit too much. Thanks.

 

I would not think the odometer is calibrated to the tire option with different tire options, I would think that would be too nitpicky of a detail to address. I would expect the odometer is a best compromise between the different tire and wheel size options. Would be very surprised if there is even a option to calibrate the odometer. The error we are talking about is 5 miles in 200 miles a very small error that may be affected somewhat by human observation - most would consider it negligible. You are interested in it and that is understandable.

How would one know their first car wasn't the one with the odometer error and the second one is the one that is right on the money? An assumption is being made that Google is accurate. There are a lot of assumptions being made that aren't confirmed.

 

I would not think the odometer is calibrated to the tire option with different tire options, I would think that would be too nitpicky of a detail to address.

From the factory? Of course it is. If you change your tires aftermarket, then no. "Nitpicky"? It not only impacts the odo, but also your speedometer, which is kind of important.

 

I ain't no expert but I've seen vehicle computer programing [replacing ECU] where the tire size is entered with a scan tool.

 

From my experience with GM cars it's called PPK (pulses per kilometer) and is adjustable on lots of cars to allow for vaiations such as diff ratio and tyre size. I have no idea if it can be done on a Hyundai. Being such a small amount I doubt it can be corrected if it is the one that is actually out.

 

Where are your resources?
Speedometer Calibration | HowStuffWorks
"No speedometer can be 100 percent accurate. In fact, most manufacturers build speedometers so they fall within a fairly narrow tolerance range, no more than 1 percent to 5 percent too slow or too fast. As long as a car is maintained at factory specs, its speedometer should continue to register vehicle speed within this range. "

 

This is the current vehicle design rule for Australia and Europe. My guess is America is also complying the Euro standard.
It's a lot of technical reading but clearly states that the speedo cannot read slower than what the vehicle is actually doing but can read up to 10% + 4 km/h fast.
I'm sure all manufacturers would err on the safe side and display a slightly faster speed for legal reasons. The odometer is another story and I don't know of any legal accuracy requirement.

 

Remember tire pressures can alter the odometer/speedometer due to circumference changes, and typically it's due to underinflation. So I'd start with that (35 psi cold) before any test . I consider myself anal, but some folks here have me beat by a lot. Ha ha. Anyway, speedos are either accurate or read slightly higher than actual, while odometers are either accurate or read slightly lower than actual. That's to avoid lawsuits from unintentional speeding, and shortened warranty periods, respectively.

 

I don't know if odometers are inaccurate. It can be pretty much spot on with mathematical calculation but as just mentioned tyre pressure and wear play a part in just how accurate they are. Satnav systems are spot on for speed but most seem to have a reasonable delay in response to speed changes. I can only assume they will get better with time and technology. I use one to check the accuracy of speedo's and always find the car to display a faster speed by a small amount.