Hi Guy's
I'm new on this forum
Had engine oil changed last night
Engine done 170.000
4.4 petrol

Put 10w40 ,it's wrong decision ?
Thank you for any advise

The recommended grade seems to be 5w40, there will also be specifications to be met, you could call at John Clark LR and ask what they recommend. Maybe in the summer you'd get away with a decent quality 10W40. Only Range Rovers since 1988

Here's a full list

https://rimmerbros.com/PopUp--id-444 __
2018 L405 3.0 TDV6 Vogue SE Fuji White
2000 4.6 V8 HSE Oxford Blue
1994 3.9 V8 Vogue Ardennes Green - resto project

Land Rover History:
2010 3.6 TDV8 Autobiography Stornoway Grey
2001 Discovery 2 TD5 GS
1999 Discovery 2 V8i XS
1994 Discovery 300Tdi
1993 Discovery 200Tdi
1989 Range Rover Vogue SE 3.5EFi
1976 Series 3 2.25
1977 Range Rover 2 door 3.5 Carb

Thank you very much Guy's
So do you think I have to change oil right now
Or I can still drive for another couple hundreds miles? 🙄🙄🙄🙄

Personally, I'd sort it straight away. However, I'm no oil expert and it might well be fine.

Is £40 worth of new oil worth damaging your engine for? __
2018 L405 3.0 TDV6 Vogue SE Fuji White
2000 4.6 V8 HSE Oxford Blue
1994 3.9 V8 Vogue Ardennes Green - resto project

Land Rover History:
2010 3.6 TDV8 Autobiography Stornoway Grey
2001 Discovery 2 TD5 GS
1999 Discovery 2 V8i XS
1994 Discovery 300Tdi
1993 Discovery 200Tdi
1989 Range Rover Vogue SE 3.5EFi
1976 Series 3 2.25
1977 Range Rover 2 door 3.5 Carb

Can you just explain to me how is 10w40 can damage engine?
Just because is to thick?
But even in manual says you can use 10w
Cheers

It will be fine unless it gets very cold up there in Aberdeen - the 5w is thinner so flows better when cold 4.2 SC - sold , now bought back
4.4 AdBlu Tractor - Stolen

Thanks for reply
That actuality was my plan trying use 10w on summer time
And change again for( autumn, winter )5w40
But I think lifters on cold start very noisy
Cheers