I bought the 6 year 21,000 miles / 24 months service plan for my new Range Rover Sport II in 2021.

First service was in April 2023 at 18,366 miles

I noticed after the first service that the effective oil service interval (miles driven between oil change plus service miles left) had dropped to 15,686 miles in April 2024, a loss of 5,314 miles oil service interval in a year. I was told this is may be due to oil dilution. In the next 6 months the effective oil service interval increased to 18,400 miles, a gain of 2,716 miles. This increase cannot be “oil dilution”. The LR garage could not explain this.

I had been sold a 21,000 miles / 24 months service plan but only got 18,400 miles / 19 months after the first service. The effective “inspection” service interval still showed 21,000 miles / 24 months.

The LR service plan team, refused to pay for the oil service as it was required 5 months earlier than planned. I had to get an extra oil service.

I checked the oil service interval after it had been re-set and it was only 19,850 miles. So, I had lost 1,150 miles of the 21,000 miles service interval before even driving out of the garage.

It is now 3 months since I had the oil changed and I have noticed that I am using up 2.14 miles of the effective service interval for every 1 mile driven. Again, the LR garage said it is “oil dilution”. I asked the LR garage to update the service interval software as I had seen that this was a problem 7 years ago on this forum. They said no.

I was just wondering if anyone had seen a similar problem with reduced and widely varying effective service intervals on their 2021 Range Rover Sport II and is there a solution to this problem?

I don't speak from experience on this particular car, but many now will vary the frequency on a number of factors including the number of engine starts, how many miles driven on each journey amongst a whole array of stats.
If you drive lots of short journeys then the service interval will go down.. longer journeys with sustained higher speeds, it will go up. For example.

Newer vehicles generally don't like short journeys, the Euro 6 kit doesn't work properly at low temperature, especially DPF filters. That's a big problem on Lonodn buses, they idel in traffic all day and the DPFs get blocked quite quickly.

kermit_rr said:

I don't speak from experience on this particular car, but many now will vary the frequency on a number of factors including the number of engine starts, how many miles driven on each journey amongst a whole array of stats.
If you drive lots of short journeys then the service interval will go down.. longer journeys with sustained higher speeds, it will go up. For example.

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I always change oil and filter at 5k or yearly whichever comes first, these days it's yearly but, I'm talking much older than 2021.
my current car is a 25 year old Merc if, I went by the service indicator it would be much too long.

LR also has a mileage or 365 day service schedule.
That should be honored as it's a requirement to maintain the vehicles longevity. They are just dodging their contract or they don't have their contract adjusted to your vehicle which is a bit naughty

I would not go by the service interval, i would change the oil and filters at half the mileage, they are very expensive bits of kit to replace and fresh oil can do no harm, and judging by some of the modern engine horror storeys with wear and oil dilution it can only be a good thing to do.

brianp38dse said:

I would not go by the service interval, i would change the oil and filters at half the mileage, they are very expensive bits of kit to replace and fresh oil can do no harm, and judging by some of the modern engine horror storeys with wear and oil dilution it can only be a good thing to do.

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+100 to the above ^^^^^^

brianp38dse said:

I would not go by the service interval, i would change the oil and filters at half the mileage, they are very expensive bits of kit to replace and fresh oil can do no harm, and judging by some of the modern engine horror storeys with wear and oil dilution it can only be a good thing to do.

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Tis good advice sir