My Range Rover performs active regens every 70 - 100 miles or when the DPF soot level is roughly 20g. I am not sure what the trigger is.

Looking on this forum I started to use the Car Scanner App to monitor it, although I have a 2016 TDv6 so can't get all the data points. I can see when the exhaust temperature rises to 600 degrees and also see the soot level falling back down to 3g.

What's also really strange is number of successful regenerations which is 53248 and the number of demanded regenerations which is 42706. The active ones never changes in values even after it seems to have done a regeneration. I have use iCarsoft LR 3 to confirm those values as well.

It's been to a specialist who can't find any issues and I have done a couple of oil changes (it seems to want an oil change ever few thousand miles) and don't seem to have a dilution issue.

Any help would be greatly appreciated, or recommendations for a specialist near to me in Hertfordshire. If no one is local I will travel.

I don't get amber DPF lights or anything like that and my shortest journeys tend to be 10 miles and over.

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IMHO If it's behaving itself and not putting on any dash lights or fault codes then it's working as it wants to...

My V8 does around 250-300 miles between regens, I get no symptoms when it does one but I do get a lot of spurious figures from plugging in the IID and using live values...

I think the old adage "If it ain't broke don't fix it" seems to apply.

Just drive and enjoy....  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Thanks for the response.

I agree, I am in two minds whether to take to someone else or just leave it. Other than this it is running nicely with no faults and the specialist who has now looked over the car a couple of time thinks it's a nice car with very little wrong with it.


Probably the thing that concerns me most is that the oil quality fuel dilution factor was 7.36 and service indicator came up after 3,500 miles after the last oil service. I got the oil changes anyway although the specialist thought didn't think it was badly diluted when he changed it. My aim would be to change it at the 6000 mile mark anyway, so in future I might have to ignore the service indicator light until it hits 6000 miles.

The car has only don 60,000 miles with a service every 5-7000.

For peace of mind, why not get an oil sample analyzed next time you change the oil?
For £35, it will tell you the real oil dilution (and a lot more besides). I change my oil twice a year, about every 2500m, and the dilution is never more than 1% despite mainly short trips.

Oil & testing are way cheaper than a new engine.

When you have some “history” you can afford to relax a little, if the car is being a bit over-zealous with the service interval.  V6 Vogue - “Less is More” - less to go wrong!

Agreed, I think I will get that done as well next time I get the oil changed as I have heard that the oil dilution factor calculation is inaccurate and possibly pessimistic.

It would be good to understand how the factor is calculated for completed active regenerations and failed regenerations.

Hi Linus
My name is Spridget and I'm a regen obsessive

There's loads of info on this forum about regens and oil dilution. I was obsessed with miles between regens and even made a spreadsheet to see how many miles I get per gram of soot, then I can work out when the next regen is due and plan my journeys accordingly. . I get about 150 miles between regens but in the winter it can be a lot more and of course short runs make it a lot less. Maybe the secret to a happy life is to let it do it's own thing and worry about it if the alarm comes up.( Says he who can't resist a peek every now and then to see how it's doing).
BTW I get about 11 miles per gram or 3.5%......not that I'm checking.

I suspect I am very similar as I like the data to make sense and the fact that the successful regen count never changes even when the regen completes as expected really bothers me.

I should just try and enjoy the drive.

Out of interest if you get about 150 miles between regens, how long does it until the service reminder pops up?

In 2 years of ownership I have never seen it. I change the oil and filter every 6 months which is normally about 3000 miles. It seems excessive but as Gremlin states 'It's cheaper than a new engine' and peace of mind, although nothing is guaranteed.
I was convinced at one time that my EGR valves were all wrong and causing the DPF to soot up faster than normal. My local Indy said 'You're obsessed with b****y EGR valves. Just drive it, enjoy it and be thankful that it hasn't blown up'.
Good luck.

My understanding is that some values returned by a car through canbus queries need to go through conversion factors to get to their real world value. Its very possible that your results are the raw values and haven't been converted.

But as said above, you're able to see it reach around 20, regen and drop back down. Its doing its job. V8 or else ...

My data is that for the 4.4 SDV8, I get 750km between active regens (the max possible). My max soot is hardly ever above 12g. In fact, I will be at 5g when the next active regen happens.

Service Interval: 26,000 km - 16,0000 miles
Active Reg Max: 750 km - 460 miles
So that is 34 Active Regs between Services - oil changes

Out of interest, I will get my oil tested at my next oil change. I will report that here.

My Current Data
10,000 km since the last oil change. Service Indicator is 8,000 km. I had had at least 1 failed Active Regen - I needed to stop after 11 hours of driving, but the active regen was in the middle. I also have a couple of Active Regens complete, but not all data reset. So the soot% is stuck at 100%, but the km until next regen is at 0 km and will climb to 750km before another one starts.

The next Service is booked for October, I think I will make it.

Using the calculation above:
Service reminder at 3,500 miles. Regen every 100 miles. That sounds about right.
The fuel dilution factor that the car calculates is an overestimate.


Gremlin500: How many active regens do you have every 6 months? It would be interesting to know. So you can say 1% is X number of active regens. The car is saying the dilution factor is. SDV8 AB MY 2020
MINI Cooper S Cabrio
Kit: Jaguar XK140 (in progress - the website is link to build)

Hi Luxmoggy, yours must be a “Kraftwerk” car?

I get an active regen every week or so , say 18 per oil change 2500 miles about 140 miles, that has reached 1% dilution the past 3 oil analysis results, but my miles to service never gets close to zero, bacause I change the oil pre-emptively, probably far too soon due to paranoia.
BUT, the wear metals have become much lower since starting the frequent oil changes and especially since changing the oil pump (pre-emptively ) at 55K miles.

Hope this helps, but what’s your drift?

EDIT: Mine’s a V6, but I don’t think therecwill be much difference? V6 Vogue - “Less is More” - less to go wrong!

So I was thinking that 18 Active Regen gives 1%. How far could I drive on 18 Re-Gens? So 13,000km or 8,000 miles.

My mid-cycle oil change should be after 10,000 km, as I do 20,000 km (12,000 miles) a year. SDV8 AB MY 2020
MINI Cooper S Cabrio
Kit: Jaguar XK140 (in progress - the website is link to build)

fisha wrote:

My understanding is that some values returned by a car through canbus queries need to go through conversion factors to get to their real world value. Its very possible that your results are the raw values and haven't been converted.

But as said above, you're able to see it reach around 20, regen and drop back down. Its doing its job.

I never take any notice of these demanded or successful regens, why would you? You dont have any Amber dash warnings the car is working fine, enjoy it. Delete those pid's from your app you are torturing yourself for nothing.

20.4g is about right for me, but remember mileage between last regen also is a trigger. Rural short journeys have brought mine down to 100 mile this will increase if you drive at a speed when passive regens start to increase this mileage trigger. Unfortunately the speed is at or above the max uk speed limit

I change oil and filter every time my incontrol app tells me. It's usually every 2-3k miles I know its fuel dilution as I get 10+litres out and only put in 9.25 litres in. So I have no reason to disbelieve the algorithm that reports this to the IC app and the vehicle dash.
I dont know if your vehicle support's the IC app but below is what you see counting down.

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Its so easy to change the oil and filter and us nerds are quite experts at that

I have also never seen an Amber on the dash as you tend to watch closer when you are near your trigger point and go the extra mile

Here is the DPF system operation
https://www.fullfatrr.com/gallery/albums/u...ration.pdf 2018 SE SDV8 4.4 Byron Blue

Thanks for all the responses and some really useful information. I think I just need to drive and not worry about it to much. I will get my oil analysed at the next oil change.

I agree those pids are meaningless to me so I should remove them from the app and not worry about them.

My incontrol app only shows when the next service is due, which is always slightly out of step with the oil service milage provided by the car.

I think I can live with oil changes every 3500 miles and I think I need to start doing some of the oil changes myself