Oils can be formulated to deliver better FE while maintaining same min film thickness as an older "less FE" oil.
Mercedes Benz M276.8 oil choice process
- Thread starter TwoC400s
- Start date
Oils can be formulated to deliver better FE while maintaining same min film thickness as an older "less FE" oil.
the components it's trying to cool absolutely do.Your oil gets to 1800F, no it does not.
Oh, absolutely. And I'm sure that's why there are so many oils in the 40
But they did so to meet the FE spec and drain interval , not to meet any kind of reduced wear level.
edit: looking here https://operatingfluids.mercedes-benz.com/sheet/229.5/en
I don't see any 229.5 approved 50wt oils.
Okay but what are your oil temps?
IMO you're over thinking this especially if you've been comfortable running Castrol Edge 5w40.
There is no 50grade 229.5 oils.
Go ask Renntech or any other tuner what they recommend.
Please report back your findings
Unfortunately MB didn't see fit to equip this engine with an engine oil temp sensor (at least not one that reports to OBD2 data).
Water temp rises by 11 degrees during a run from 206 to 217 (and that's despite it going from sitting still to having air pushed through it at 120mph)
I'm not really comfortable running the Castrol anymore, especially at the track. That's why I'm here.
The problem is 7.5k miles on tuned+dragstripped DI, not the oil you are running IMO.
Edit:
Porsche C40 + MB 229.52 might an alternative, just like HPL / Amsoil / Driven etc. But you should probably still stick to 6months OCI.
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if i'm interpreting this correctly, you think just keep using Castrol, but run a short OCI for track season?
Yes see edit above.
Did you even look at my UOA?With respect to the previous spec of MB 229.3, yes, 229.5 is absolutely an oil that requires better fuel mileage than it's predecessor.
See this thread: https://bobistheoilguy.com/forums/threads/the-mb-229-5-specs.2402/
As to my "supposition" on shearing... Is it your supposition that an engine with 7 toothed timing gears, 4 timing chains, and two hot turbos WON'T put a mechanical and heat shear load on the engine oil?
Give me a little credit (it's 11 seconds and change
And yes I do, due to the way the MB ECU works, operating fluid temps need to be above a certain level or you just go into open loop and the ECU doesn't take as many sensor's data into consideration. At the end of a pull it's HOT.
Yes top fuel/funny car/pro mod dragsters use quite thin oil, most of them are also custom blended for their application, they also don't (usually) have twin turbos and a dozen toothed sprockets and timing chains. Dragsters usually also run fuels that cool the charge air much cooler than my Eth/pump gas blend (especially since it DI), when PI turbo cars switch over to methanol they can usually ditch intercoolers entirely.
Oh, and most Dragsters don't drive to and home from the track...
Any idea what the M275 looks like inside?
Your engine is down eight cylinders, so a lot fewer valves, and even with your tune, quite a bit of power, compared with the engine that has done so well on MB 229.5
MB 229.5 allows for 40 weight with high threshold for minimum HTHS.
It was from your manual that I got the 50wt. Your manual. Not mine.
The HPL would be a fine choice for your engines, in a long drain interval application.
The data shows it.
M276.8 = 6 Cylinders, 24 valves, 4 cams, 3.0L, (tuned) 160hp/L
M275= 12 cylinders, 36 valves, 2 cams, 5.5L, (stock) 92hp/L
I did look at your UOA, it looked fantastic.
I'm not saying HPL wouldn't be a good oil, at least I can't see a place where anything I've said would be interpreted as that.
I gave you good advice on oil, despite your misconceptions on oil specification.
You dismissed it, thinking your Benz is special.
You quote the wrong statistics for my engine, to further your bickering, while not discussing the relevant points.
Good luck with your car, kid, I’m out.
He says HPL for your wifes car, as longs has she doen't drive to short distances.
Fuel dilution concerns in your car excludes long OCI's (without UOA) again IMO.
Tuned MB: HPL 5W40 BAS.
Regular: any MB229.5.
Regular: any MB229.5.
Before you get into “i bought Mercedes, therefore ai know stuff,” a lot of people here have FAR more competitive experience than you +worked/work in industry. That won’t cut here.
You got sound advice. Don’t be dentist with new Porsche at local track that thinks he is fastest, and than some Miata whoops his butt.
what was the inaccuracy of what I posted about a 2005 S600 M275?
Mercedes-Benz M275 engine - Wikipedia
The Evolution of the M275 AMG, Affalterbach’s Legendary V12 Biturbo Engine
With internal combustion engines now facing extinction, let's remember how Mercedes-AMG's most epic V12 evolved through the years
www.autoevolution.com
please don't project some kind of smarmy attitude onto me.
If those people with "far more experience than me" say something inaccurate, why should they get a pass?
Those people gave you advice. You came here for confirmation bias. You got advice and started to argue.
I told you what to use.
5W40 BAS is track oil (and drag is nowhere nearly as taxing on an engine as track is) made for “alcoholic “ engines like your tuned MB. It is also streetable oil.
Non tune MB can use ANY MB229.5. If you want best go HPL Euro 5W30, Castrol Edge 0W30, Mobil1 0W40, Pennzoil Platinum Euro 5W40, Motul X-Cess 5W40 GEN2.
Castrol 5W40 you are using now is just mediocre oil and it always was.
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