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Old 23rd October 2023, 19:47   #1
johnnyb44
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Smile As the miles click by it just sounds better and better.

Hi,
My diesel 75 is gracefully racking up the miles.Its just shy of 160k now and I've noticed that with the ever increasing mileage, the engine seems to become ever more refined.The last 10k ,its become particularly noticably quiet to the point I can barely hear it running..(Is this the sweet spot of a 75 diesel engine mileage wise)
I was always lead to believe older diesels usually become clattery with age.
Lately I've been getting itchy feet with concerns about its mileage,but in reality it sounds and feels better now ,than in the 10/11 years I've had it.
Even the interior doesn't squeak or rattle. I've driven cars 10/15 years newer than the 75 and with only a faction of miles covered and they sound harsh and unrefined.
I don't know whether I can claim credit for this for changing the oil religiously every 5k and drop a spot of 2 stroke oil into the tank on every fill up.
I also use Red Ex regularly too.
I wonder how long this could last for before the old engine eventually wears out.
All the very best,
Johnny.
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Old 23rd October 2023, 21:11   #2
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Check the thread about Moon Mileage to see how many miles a diesel will do, it should put your mind at ease.

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Old 24th October 2023, 07:51   #3
Mike Noc
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Quote:
Originally Posted by johnnyb44 View Post
I don't know whether I can claim credit for this for changing the oil religiously every 5k and drop a spot of 2 stroke oil into the tank on every fill up. I also use Red Ex regularly too.
I wonder how long this could last for before the old engine eventually wears out.
All the very best,
Johnny.

Well mine has done over 440k miles and still going strong. I change the oil every 15k miles as per the service schedule and nothing lubricated by the oil has ever been touched.

I don't put any two stroke oil in the tank (the clue is in the name - two stroke oil is primarily used for upper cylinder lubrication and like most four stroke engines, the M47R has all the upper cylinder lubrication it needs). I do add some decent injector cleaner a couple of times a year. The injectors and HP pump are all original too, but the balance figures are still fine.



So you should have a good few years motoring ahead before your engine wears out.
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Old 24th October 2023, 09:32   #4
johnnyb44
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Wow 440k,That is amazing and a testament to how good these engines are.
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Old 24th October 2023, 09:36   #5
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Johnny, have you had your hearing checked recently?

Seriously though, it's so comforting when one can be smug about the car.
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Old 24th October 2023, 22:02   #6
bl52krz
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Rover 75 cdt club + Rover 2.5 KV6 Conni SE

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Hi John. Up norf there is a 75 diesel that must by now have done around 800,000 miles. It had done 560,000 about 5 years ago. I think it was a taxi serviced by one of our members.
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Old 25th October 2023, 06:31   #7
johnnyb44
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560k Miles!!!
Now that would be a car I would love to see and drive.
It would be very interesting to compare it to something that's done a lot less miles.
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Wax oiled.Air con recharged. Auto box oil changed , Jules plenum guard fitted .Smoked wind deflectors fitted.S/S Compensator.Club Grill Badge kindly donated by Andyg2011..
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Old 25th October 2023, 09:08   #8
bl52krz
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We have had some at our Nano Meets that have 250.000 miles or more, and still look ok.
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Old 25th October 2023, 15:34   #9
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Regular oil changes with good quality oil is the key to longevity with a diesel. The first Atkinson Borderer (Cummins 220) that I drove, came with a driving lesson from the "trunker" that had driven it to Scotland and back from Yorkshire, every week for decades. he said don't drive it, make love to it ....... and that dunt mean **** the **** off it, it means caress it, cherish it and lavish affection on it! He was spot on! Once you settled into the correct way, your driving became relaxed, it never let you down and you grew to love and adore it! I saw a Vintage Commercials magazine, featuring the Borderer and I thought that if that is now a Classic, then I am too! "She" may have been slow off the mark but once you got her going..................
Oh Yes! Change the oil regularly!
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Old 25th October 2023, 21:31   #10
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My 2.5 auto does run more moothly when I am feeling generous, on Shell V-Power petrol
Shell make a lot of claims for how this fuel cleans and protects engines as well, apparently making them run more economically:
https://www.shell.co.uk/fuels-oils-a...-unleaded.html .

Perhaps worth a fill-up at least once in a while?

Of course, I have no experience with the diesel equivalent fuel.

All the best,

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