Clubjazz - Honda Jazz & HR-V Forums

Honda Jazz Forums => Honda Jazz Mk4 2020 - => Topic started by: AlanTR on July 30, 2026, 12:58:40 PM

Title: High mileage mk 4 Jazz
Post by: AlanTR on July 30, 2026, 12:58:40 PM
Has anyone achieved 100,000 miles or greater with their Mk 4 Jazz/Crosstar?

If so, what has been your experience with regard to the 1.5 litre engine and HV battery performance? Any significant problems? Like many people I have concerns about the use of 0W20 lubricating oil and its effects on engine longevity.

We live in NE England and our 21 plate Crosstar has 34,000 miles on the clock and has been used mostly for short journeys plus occasional trips to Cornwall, Lake District and Scotland. So far the car has been problem free and we are going to keep it for a few more years.
Title: Re: High mileage mk 4 Jazz
Post by: zdan on July 30, 2026, 01:47:15 PM
Currently running at 60k with no major issues

(https://i.postimg.cc/ZnjNr2Lw/12211212.jpg)
Title: Re: High mileage mk 4 Jazz
Post by: Nicksey on July 30, 2026, 08:36:28 PM
My 72' 4 year old Jazz just hit 42,000 miles with the engine/HV battery still sweet as a nut.
Its a 1.5 so should be able to handle most motorways without bother, and it is much less stressed than a typical ICE car because the electric motor is always helping it out.
It was always going to be our 'last' car, which means after the 5th service I will be buying another couple of years of service/warranty plan. I see no reason that the car won't be good for at least 150,000 miles.
Title: Re: High mileage mk 4 Jazz
Post by: aphybrid on July 31, 2026, 07:34:05 AM
"because the electric motor is always helping it out."

As I understand it the electric motor is permanently driving the car and the ICE drives the generator and only directly drives when above =/-70mph
Title: Re: High mileage mk 4 Jazz
Post by: Kremmen on July 31, 2026, 08:53:03 AM
Given the engine isn't running for each mile it should last a long time

Maybe the electric motors will wear out first, bearings ?

Are they brushless
Title: Re: High mileage mk 4 Jazz
Post by: Lord Voltermore on July 31, 2026, 09:17:38 AM
Quote from: AlanTR on July 30, 2026, 12:58:40 PM
Like many people I have concerns about the use of 0W20 lubricating oil and its effects on engine longevity.
Is 0W20 oil  a concern?  Its low viscosity is specially suited to modern engines with precise engineering tolerances , and circulates more quickly from cold. Its has advanced additives ,some of which help extend its  longevity in service  (should service intervals be extended or neglected)  and made to quality standards which may not have been possible a few years ago.

IMO the main concern is  when 0w20 oil is NOT  used (or an older specification 0w20 missing some additives). The idea that a thicker oil is more 'oily'  or somehow fills increased clearances on high mileage engines  is perhaps outdated.    Something like 80% of engine wear occurs during the first few miles from a cold start.  Cold ,thicker, oil takes longer to reach and lubricate moving parts extending the period of unfavourable high wear conditions.   But other opinions are available. ;D Maybe the thicker oil also takes longer to drain down , leaving parts with a coating of oil. And those who do high mileages tend to do most of their miles with a hot engine.
Title: Re: High mileage mk 4 Jazz
Post by: Marco1979 on July 31, 2026, 12:14:23 PM
Quote from: aphybrid on July 31, 2026, 07:34:05 AM
"because the electric motor is always helping it out."

As I understand it the electric motor is permanently driving the car and the ICE drives the generator and only directly drives when above =/-70mph
You can see it on one of the screens when direct drive is happening. It is above 40 mph or 65 kmph, when under light load. You can also hear rpm going down when you accelerate gently when passing 40.
Title: Re: High mileage mk 4 Jazz
Post by: AlanTR on July 31, 2026, 04:36:34 PM
The use of 0W20 oil was always about meeting the demands of new emissions standards rather than maximising mechanical longevity. There are numerous reports that this had led to problems with some modern (mainly turbocharged) petrol engines.

Fortunately the Mk.4 e:HEV Honda Jazz engines are fairly low stressed naturally aspirated engines which should be durable - time will tell. I'm keeping mine and have paid for 3 more years guarantee and service plan.
Title: Re: High mileage mk 4 Jazz
Post by: Nicksey on July 31, 2026, 05:44:59 PM
Quote from: aphybrid on July 31, 2026, 07:34:05 AM
"because the electric motor is always helping it out."

As I understand it the electric motor is permanently driving the car and the ICE drives the generator and only directly drives when above =/-70mph

As Kremen has mentioned, maybe the electric motor... and add to this the generator, may wear out BEFORE the petrol motor thingy?  :o
Title: Re: High mileage mk 4 Jazz
Post by: Lincolnshire Rambler on July 31, 2026, 10:05:02 PM
My 71 plate Jazz is almost at 74,000 miles so nearly at its next service . No noticeable deterioration in engine or drive train performance over that distance. On front suspension i suspect the drop link bars off the antiroll bar will need replacing as on some potholes the bounce seems not as tight - if that make sense ! Our badly surfaced roads eventually degrades the suspension performance! 
Title: Re: High mileage mk 4 Jazz
Post by: sebastiand on August 01, 2026, 01:16:19 AM
Yeah here once I reach 74k miles I'm sure I'll have to change the shocks. They put speed bumps everywhere where I live.

Sent from my Pixel 9 using Tapatalk

Title: Re: High mileage mk 4 Jazz
Post by: Hicardo on August 01, 2026, 09:08:23 PM
Id like to know what the all time high mileage has been in a MK 4 Jazz.  Any idea?  I dont see 0/20 as an issue for mechanical longevity.  Its synthetic and changed every 12K or less - for me its about 6K.  It contributes to the maayzing mpg, thats for sure.  Some cars are going 20K and 2 years before an oil change. 
Title: Re: High mileage mk 4 Jazz
Post by: coldstart on August 01, 2026, 10:52:38 PM
Quote from: AlanTR on July 31, 2026, 04:36:34 PM
The use of 0W20 oil was always about meeting the demands of new emissions standards rather than maximising mechanical longevity. There are numerous reports that this had led to problems with some modern (mainly turbocharged) petrol engines.

Fortunately the Mk.4 e:HEV Honda Jazz engines are fairly low stressed naturally aspirated engines which should be durable - time will tell. I'm keeping mine and have paid for 3 more years guarantee and service plan.
You shouldn't compare "normal" and especially not turbo charged ICEs with Honda's e:HEV drive train.
The Jazz is my first hybrid car and I was quite surprised by how clean the engine oil stays over an entire year of use (~10'000 miles / 15'000 kms). In fact, it stays so clean that it is a permanent problem to make out the level on the orange part of the dip stick.
So, I'm not overly worried about (ICE) engine-wear - as for the electric motors: Time will tell! The e:HEV Jazz was only introduced in 2020 and you therefore can't expect any longterm reports (yet),
Title: Re: High mileage mk 4 Jazz
Post by: Lord Voltermore on August 02, 2026, 08:59:47 AM
Is it too simplistic to say that if a hybrid runs in EV  mode for maybe 25% of the time, if the car has done a total of 56K miles the ICE itself has only done the equivalent of  42K miles? 

Even if you dispute the 25% EV mode figure  there will  be periods when even if the ICE is running it  be under less stress, load and maybe fewer  RPM , than in a conventional car due to support from the electric drive.
Title: Re: High mileage mk 4 Jazz
Post by: Pine on August 02, 2026, 12:15:47 PM
The oil grade on my 2020 Toyota Corolla was 0/16.  On newer models it is now 0/8.  So I don't think 0/20 is going to be an issue with the Jazz.
Title: Re: High mileage mk 4 Jazz
Post by: coldstart on August 02, 2026, 09:07:34 PM
Quote from: Lord Voltermore on August 02, 2026, 08:59:47 AM
Is it too simplistic to say that if a hybrid runs in EV  mode for maybe 25% of the time, if the car has done a total of 56K miles the ICE itself has only done the equivalent of  42K miles?
I think it is more important, that the Honda e:HEV drive train mostly keeps the ICE at predefined "optimal" load levels. This cannot be compared with a conventional ICE car, where the engine has to provide power at all times - probably even mostly under less than optimal conditions.

Title: Re: High mileage mk 4 Jazz
Post by: Nicksey on August 03, 2026, 04:26:51 PM
Today our 72' plate EX with 42,360 miles had it's 4th service (of it's 5 year plan).
We did decide to have the AC checked/cleaned/re-gassed, as we use it constantly at the moment and I also wanted to see how the condenser was holding up. They charged me £89, and everything was good. Something else less to stress about further down the line.
I had asked prior to the service about the brake simulator, but as it is still showing no recall for my car it wasn't deemed necessary at this time. Fair do.
Everything else checked out, the engine oil/filter and transmission fluid (along with the wiper solution) were all replaced. The electric battery passed on all points, and is still at optimum performance. The TOYO tyres I replaced the YOKOs with have done 11,000 miles and are only just shading under the 6mm mark at each corner. Brake wear is at 35%, which is phenomenally good for a 40k + mileage car.
So, I am happy and the car is good for another years driving.
Title: Re: High mileage mk 4 Jazz
Post by: gusgeds on August 03, 2026, 06:41:44 PM
Really no problem with the recommended C5 0w/20 lubricant. I choose to change mine every six months/5000miles with C5 508/509 spec oil which fulfils the C5 0w/20 requirement but with a very strong additive package, overkill probably, but my choice for hopefully a long trouble free life.
Title: Re: High mileage mk 4 Jazz
Post by: Lincolnshire Rambler on August 04, 2026, 09:07:16 PM
And at almost 75k miles the front discs show minimal wear , maybe 1mm at most . They dont look smooth and shiny as the vast majority of retardation is in Regenerative mode . So should last 10,000 s of miles yet .
Title: Re: High mileage mk 4 Jazz
Post by: nowster on August 07, 2026, 02:23:00 PM
Nearly 64,000 miles in mine.

The engine is Atkinson cycle, which performs best at higher revs. This is the big win in efficiency. The battery is there to act as a energy sponge. The generator/motor combination allows for high torque at low speeds whilst running the ICE in its highest efficiency range.

That's compared with the VVT of earlier Jazzes which switch between Otto and modified Atkinson cycles depending on load.

And the drive train is amazing at climbing steep hills.

Brake pads last much longer due to regenerative braking. In fact you'll probably have the discs called out at a service for getting rusty before the pads need changing. (The way to fix that is to do a series of low speed firm braking operations: the regenerative system doesn't kick in below about 5mph.)
Title: Re: High mileage mk 4 Jazz
Post by: Jazzik on August 19, 2026, 01:35:20 PM
Quote from: nowster on August 07, 2026, 02:23:00 PM
In fact you'll probably have the discs called out at a service for getting rusty before the pads need changing. (The way to fix that is to do a series of low speed firm braking operations: the regenerative system doesn't kick in below about 5mph.)

Our Jazz has a perfect brake disc cleaner on board:

(https://ireland.apollo.olxcdn.com/v1/files/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmbiI6Ims1Znh5b2o2d3Zzdy1TVERWVExQVCIsInciOlt7ImZuIjoiNm1nandscDdrZ2RiMi1TVERWVExQVCIsInMiOiIxNiIsImEiOiIwIiwicCI6IjEwLC0xMCJ9XX0.VjFsCAdo_SYTj1-i4JvGnMnkG48NdRD1YnjEY5Zmjj4/image;s=5120x0;q=100)

Drive at a reasonable speed (on an empty road!) and activate the handbrake. You know, that lever with the red LED in the picture.
The handbrake works on all four wheels. If you use this trick every now and then, your discs (yes, the rear ones too!) will stay beautifully shiny and free of rust.

By the way, it serves not only as a handbrake but also as an emergency brake. Should something serious happen to the driver, the passenger (provided one is present and informed, of course) can bring the car to a halt using the same lever.


Title: Re: High mileage mk 4 Jazz
Post by: sebastiand on August 21, 2026, 07:00:29 PM
Quote from: Jazzik on August 19, 2026, 01:35:20 PM
Quote from: nowster on August 07, 2026, 02:23:00 PM
In fact you'll probably have the discs called out at a service for getting rusty before the pads need changing. (The way to fix that is to do a series of low speed firm braking operations: the regenerative system doesn't kick in below about 5mph.)

Our Jazz has a perfect brake disc cleaner on board:

(https://ireland.apollo.olxcdn.com/v1/files/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmbiI6Ims1Znh5b2o2d3Zzdy1TVERWVExQVCIsInciOlt7ImZuIjoiNm1nandscDdrZ2RiMi1TVERWVExQVCIsInMiOiIxNiIsImEiOiIwIiwicCI6IjEwLC0xMCJ9XX0.VjFsCAdo_SYTj1-i4JvGnMnkG48NdRD1YnjEY5Zmjj4/image;s=5120x0;q=100)

Drive at a reasonable speed (on an empty road!) and activate the handbrake. You know, that lever with the red LED in the picture.
The handbrake works on all four wheels. If you use this trick every now and then, your discs (yes, the rear ones too!) will stay beautifully shiny and free of rust.

By the way, it serves not only as a handbrake but also as an emergency brake. Should something serious happen to the driver, the passenger (provided one is present and informed, of course) can bring the car to a halt using the same lever.
I tried it today. Couple of times. Cool feature.

I used it a few times to go from 70kmph to 40-60. I got the release parking brake warning (that I managed to read in one of the attempts because I was releasing before being able to read)

Sent from my Pixel 9 using Tapatalk
Title: Re: High mileage mk 4 Jazz
Post by: Lord Voltermore on August 22, 2026, 10:18:51 AM
I think all mk4 drivers  should try this at least once even if your discs dont need cleaning.

The button is also your emergency brake,  in the unlikely event of not being able to use the foot brake.(eg complete hydraulic failure, maybe the brake pedal siezing or dropping off, or your leg trapped, or some sort of medical emergency.) Its not as obvious as using a conventional handbrake lever  , so familiarity with the system makes it more likely you , or a front seat passenger (even non drivers who have been 'initiated')  will react more quickly  and be able to stop the car in an emergency.

You just need to pull the button up with a finger ,and keep it pulled up.  . For a second or two the braking affect is quite slight.  Maybe to give the driver time to react if a curious passenger unexpectedly pulls on the switch.    But braking quickly becomes more powerful perhaps reaching a more rapid stop than you are comfortable with. If so just release the switch a bit.  With a bit of practice you can actually control the rate of braking  by easing off on the switch slightly which could help you come to a more controlled stop - if you have room. But not a 'skill' that has any practical use in normal driving. ;D 

It also gives reassurance that the car has effective independent  duplication of its braking systems  . In the event of hydraulic failure or non function of the foot pedal, the electrical systems would still be able to apply either partial hydraulic braking, or if there are no hydraulics at all  it can still apply the powerful electric rear parking brakes . In the event of complete  electrical failure the hydraulic brakes should still be working, albeit without (electric) power assistance.

In the most unlikely even of both systems failing at the same time I think you must accept your fate  is sealed ;D

I really like an electric handbrake.  Especially coupled with the cars 'brake hold' function.   But no more 'handbrake turns'  :(