Engine OIL for C63 AMG, question.

The only thing you are adding is more evidence of your own ignorance.
My brother initially used Mobil 1 0W/40 in his twin turbo LS2 powered car and the oil pressure gauge would fall to zero after a fang at idle. The oil pressure light didn't come on though so there was still some oil pressure just not enough to register on the oil pressure gauge! He ended up switching to Castrol 10W/60 and the car has run fine in this level of modification for the last 12 or so years.
I seem to recall the Corvette owners manuals were recommending Mobil 1 15w/50 if the car was being tracked instead of the standard 5w/30 fill.
I've been using Castrol Edge 0w/40 in my Ford G6E turbo for the last 9 years and runs fine with zero oil consumption. I was thinking of trying it in the C63....anyone have any UOA on the Castrol in this weight in the C63?
Last edited by juggernaut1; May 7, 2019 at 12:14 AM.




Those cars have completely different engine architecture and requirements than an M156. You use anything thicker than a 5W-40 at your own jeopardy as the engine and it’s small oil passages were not designed for it. Regardless of what it “sounds like” or if the oil runs out “like water”, the fact is that the engineers who designed and built the engine specified a specific weight range for a reason. If you’re not running UOA’s after oil changes and quantifying if the oil is good, bad, or otherwise, and going off of prior experience with other cars or what you “feel” is the right oil by look or sound, then you’re doing it wrong.
Last edited by juggernaut1; May 7, 2019 at 12:30 AM.
My last 3 oil changes were the new molygen 5w40 but want to try a thinner oil to see if the car runs better.
Stick with molygen? Go back to 8100? Try rotella?
The Best of Mercedes & AMG




The M1 0W-40 is a great oil too.
You really can’t go wrong with either.
Edit I'm picking up some t6 tonight
Last edited by skratch77; May 7, 2019 at 08:04 PM.
https://mbworld.org/forums/c63-amg-w...c-229-5-a.html
here in UAE we have multiple options as the weather is extremely hot we suggest to have thicker oil, need suggestions
If you are overheating the oil - a known issue in a C63 with the MCT in ANY climate - you need a bigger oil cooler, not a thicker oil.
If you are overheating the oil - a known issue in a C63 with the MCT in ANY climate - you need a bigger oil cooler, not a thicker oil.
I had some correspondence with Blackstone on their observations with various oils in M156 cars, and they had this to share:
I'd pick either of those over this latest Mobil 1 5W-40 since they have been shown to (via numerous UOAs) to work well in the M156.
Also, keep in mind, this thread is nearly a decade old. Pretty much all of these oils have experienced formulation changes since then.
Last edited by HLG600; Jan 15, 2025 at 09:10 PM.
I had some correspondence with Blackstone on their observations with various oils in M156 cars, and they had this to share:
My car ran Rotella T6 for awhile, although the last few OCIs were on Motul Xcess Gen2.
I'd pick either of those over this latest Mobil 1 5W-40 since they have been shown to (via numerous UOAs) to work well in the M156.
Also, keep in mind, this thread is nearly a decade old. Pretty much all of these oils have experienced formulation changes since then.
It's really an exception case here, as it does not carry the MB approval, but is an excellent oil with a strong track record in the M156 community (many UOAs to back it up).
Mobil 1 was factory fill for a long time, but I am not sure who makes it for MB these days.
Have you compared UOA between the 2? I have a handful from T6 (all excellent results) but haven't with the Xcess Gen2 yet.







