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AlexGSi2000

e39 M5 Oil Choices.

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Evening,

 

After some advice on which oil to use in my newly acquired M5.

I know the factory recommended is Castrol Edge FST 10w-60, however I was wondering if anyone had any experience using other brands?

 

The car is currently using Valvoline VR1, which is a semi-synthetic. I will be aiming to carry out oil changes every 5,000 miles / 12 months or whichever comes first.

 

I have picked out the oils below as those I think would be suitable.

 

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Many would disagree, I have been using Mobil 1 Long life 0W/40 fully synthetic in my M5 for some time and have no issues.  Some argue it's better cold protection for the rod bearings as it's thinner from cold so gets pressure to the bearings more quickly.  Many also use 10W/60, especially if running the car on track or at speed where the temperature remains high.  Can get that oil for a pretty good price too which always helps.

 

BMW actually changed their recommended viscosity on face lift cars to 5W/30 I believe?  Something around that, might be worth checking out for certain.

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Thanks Jon,

Ah, that's interesting - whenever I enter my registration into any car part / oil sites I'm recommended 10w60.

 

Normally I wouldn't be too bothered, I usually run 5-40 fully synthetic in my other cars, however as I class the S62 as a highly-strung engine I'm conscious about my oil choice.

 

At the moment Im leaning towards the Castrol, but interesting point you make regarding the 5-30.

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When I got my M5 and researched oil 10w60 was unanimously recommended. I replaced rod bearings upon purchase, then stuck with Castrol Edge 10w60 religiously and the engine ran perfectly from 90k until over 160k. 

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Up to March 2000 10W60 - Post March 5W30 although the later cars are fine on 10W60 as well.

 

Castrol Edge or Mobil 1 are generally up to the mark. 

 

It always used to be Castrol TWS but when that was phased out it became Castrol Edge but owners were told not to use Castrol Edge Sport. These days I think Castrol FST should be fine along Mobil 1.

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Castrol Edge/FST 10W60 religiously for me over two M5s and loads of miles.

 

However...

 

On 01/04/2019 at 23:33, DepthHoar said:

Shell Helix Ultra Racing 10W60 user here. 

 

Just paid £117 plus change for a 20 litre barrel (£5.85 per litre).

Bought here: https://www.123engineoil.co.uk/Engine-oil/SHELL/Helix-Ultra-10W-60-Racing/p-OIL-465

 

 

 

That is astonishing value.

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I have used Castrol, Shell and currently Fuchs Pro Race S and haven't found any real difference between any of them to be frank. So long as you are using a good quality recognised brand, changing it regularly will have more effect than which brand you use IMO. Personally I cant see the technical reason why BMW specifies 10w-60 as it is very thick when almost all other manufacturers stick with 5w-40 or similar in their high performance models so I can see why people switch to this grade, however careful warming up with 10w-60 should effectively mitigate the effect when cold.

 

I will probably head back to Shell next, simply because its brilliant value and I know its highly regarded in the states for its thermal stability when used hard. Having spoken to numerous specialists and engine builders they all say the same thing - change it regularly and forget about it.

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Thanks for all your input on this.
Some valuable opinions and advice - after these comments I think I will stick with 10-60 and more than likely go for either the Castrol or Shell oils.

Sent from my BBB100-2 using Tapatalk

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