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      05-11-2021, 07:29 PM   #45
RagtagXMASTER
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Originally Posted by LJohnson32 View Post
In sport plus drivetrain mode, what do your temps usually look like with the 5W-50? With the Liqui-Moly Molygen 5W-40, temps stay around 195 +/- 5 degrees, which I have been pretty happy with as far as thermal management is concerned
coolant temp for me stays around 180-190F, oil temps stay between 200-220F on a nice day if its 70-80F ambient. currently if its the 65F ambient I get about 195-200F for oil temps
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      05-13-2021, 08:26 PM   #46
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I have been looking into swapping oils. I recently had BMW do a oil consumption test and it is with spec but goes through about a later every 1300km. It's crazy.
I noticed most everyone goes to a thicker oil 5w-40 and 5w50 etc, I was looking at Castrol Edge website and noticed they do an oil that is 10w-60 which seems way to think but it does say that it is suitable for all BMW M-Models.
Has anyone tried this?
https://www.castrol.com/en_au/austra...-supercar.html
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      05-24-2021, 09:47 AM   #47
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Originally Posted by chrisveal View Post
I have been looking into swapping oils. I recently had BMW do a oil consumption test and it is with spec but goes through about a later every 1300km. It's crazy.
I noticed most everyone goes to a thicker oil 5w-40 and 5w50 etc, I was looking at Castrol Edge website and noticed they do an oil that is 10w-60 which seems way to think but it does say that it is suitable for all BMW M-Models.
Has anyone tried this?
https://www.castrol.com/en_au/austra...-supercar.html
I'd say the 10-60 is too thick on these engines, it was used on the previous generation M3/5/6, with the S65 and S85 engines. I wouldn't go much further than the 50 weight on the s63tu engine.

also that's a lot of oil consumption at 1300km. you can try and step up your oil grade and it should help, but that's pretty ugly. that shouldn't be ok, but BMW will say its probably ok even if it was blowing smoke out the back
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      06-04-2021, 07:58 PM   #48
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Originally Posted by RagtagXMASTER View Post
I'd say the 10-60 is too thick on these engines, it was used on the previous generation M3/5/6, with the S65 and S85 engines. I wouldn't go much further than the 50 weight on the s63tu engine.

also that's a lot of oil consumption at 1300km. you can try and step up your oil grade and it should help, but that's pretty ugly. that shouldn't be ok, but BMW will say its probably ok even if it was blowing smoke out the back
It is a lot, apparently this is an acceptable amount of consumption. I jokingly said BMW should of put an oil cap next to the fuel cap so every 3rd or 4th tank I could top the oil off. They didn't;t think it was as funny as I did. I have changed to Castol Edge 5W-40 and see how this goes.

I thought that oil seemed a little on the thick side, thanks for your reply, much appreciated.
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      07-13-2021, 05:48 AM   #49
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Ok, I'd be keen to hear thoughts if anyone has fact based knowledge… Have had oil analysis 2 times at appr 4-5k miles intervals, currently the car has 28k kms, or appr 17k miles on it. No oil consumption, always used BMW recommended oil, I think on Australian markets it's likely Castrol, 10W-40.

The analysis has come back both times great, except for one thing - fuel dilution. Both times 3%, which according to the oil lab is well over acceptable level, both times they recommended checking injectors. So, I've taken these results back to the dealer seeking for their resolution, the first analysis was well before warranty expiry. The dealer, apparently based on BMW Australia advice, put the results into the basket of "bad driver profile", likely due to lots of short distance driving.

Moved to a new area, this changed my driving habits significantly, ie. no short distance anymore, nearly all Highway and longer distance. This was majority of the use leading up to the second oil analysis, after which the second dealership (local here) suggested that to eliminate the lab mistake, we would take a new sample and they send it to the lab they use - I guess fair enough… Now, appr. 3-4K miles after the oil change I suggested to the dealer it might be an opportune time for this. The next bit sounds a bit surprising, so thought I would seek opinions… According to the dealer, BMW Australia had advised them that the threshold to "warn" the customer is ~7% fueldilution, and at 10% the oil would be considered as contaminated…!!! They also suggested waiting until the recommended oil change mileage, which I think would be something like +15k miles - not going to happen…

So, my suspicion is that a new analysis would come back with appr. the same 3% fuel dilution, but if the manufacturer/importer's definition of "too high fuel dilution" is 7-10%, I'm assuming the outcome would be "no result"…

So, the question I suppose is "how bad is 3% fuel dilution"? Anyone with fact based data on this - thoughts much appreciated…
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      07-13-2021, 10:23 AM   #50
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Thatís a bunch of horse shit at 7%. I just had my injectors recall and the dealer replaced all of them. 3% is high, I would imagine your car will get worst over time, not magically better so either change your oil earlier or find out the root of the problem before you ended up with a rod sticking out of your block.
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      07-13-2021, 09:47 PM   #51
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fuel dilution will increase the chances of lspi. it emulsifies the oil and with higher percentages of fuel in your oil, you will more likely have detonation events on the sidewall of the piston. that will lead to a blown motor since most likely it will break off the top of the piston.

most likely you have an injector that is leaking down through the cylinders and because BMW does not want to replace it they create BS stories on what is acceptable.

have the injectors replaced before significant damage occurs. a good/normal dilution should be less than 0.5 percent
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