Heavier oil to reduce consumption ?

[briankerrys47]

Correct Smee? Even Richard has only posted once this time ,last time I had to rain him in  O:-) )

[X5Sport]

:ras:

[X5LAW]

Thanks for the quality replies. I read in the halfords oil guide that earlier m54 engines should use 10w40 anyway, so I'm thinking when I next top up, I might mix some in.

Any danger specific to blending two grades?

[briankerrys47]

Just ask Halfords ? ::) :blink: :blink:

[jaynana]

I'd ask X5Sport   

[briankerrys47]

[quote="jaynana"]
I'd ask X5Sport   
[/quote]Yes but if he does ,Richard keep reply to one post please  O:-) O:-) )

[omodos]

[quote="X5LAW"]
Thanks for the quality replies. I read in the halfords oil guide that earlier m54 engines should use 10w40 anyway, so I'm thinking when I next top up, I might mix some in.

Any danger specific to blending two grades?
[/quote]

I have mixed mobil full synthetic 5w30 (75%) with 0w40 (25%) for the last 2 years, not an issue yet

[X5LAW]

That's encouraging, thanks.

I'll maybe try topping up with 10w40 in future and then make an executive decision at oil service time which to stick with.

Thanks for all the helpful posts, x drivers.

[wolfgang]

I run an E53 (115,000 miles) on Mobil 1, Extended Life 10-60 oil.  Before this, when the car was getting oil services through BMW, I got a top-end rattle on start-up if the car had been stood a few days - now there is no such noise.  Looking inside the filler hole (into rocker covers) the chain and cam are spotless.  I also run a 97,000 miles E31 on the same oil - there is no oil use between services on either of these cars.