Shell Rotella T6
It's not mb 229.5 but tons of guys use it in all kinds of high performance cars.




Diabolis seems to like it: https://mbworld.org/forums/c63-amg-w...ml#post6626517




I'm thinking about it as well. Have been doing M1 0W-40, initially treated once with LiquiMoly CeraTec and now following up with LiquiMoly Mos2 and car seems to like it.




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Having said that, the T6 is more stable at high temperatures than the M1 (with our inadequately-sized oil cooling capabilities on the C63 this is IMHO a big plus), and in terms of HTHS and wear protection, the T6 is near the top of the pecking order and I like it a lot for flat tappet engines like the M156. And, at half the price of M1, you can afford to change it twice as often, which is key to having the best engine protection. I wouldn't run it year-round in Canada (my C63 is my DD), but that's what I run in my "massaged" summer toy P-cars that only see ~3000 fairly-hard-run kilometers in warm weather between oil changes. I've never seen cleaner engines in my life, and the wear protection of the T6 is second to none.
Just my $0.02. BITOG is an excellent resource on the topic, as are some of the Nissan GT-R forums. The GT-Rs are brutal on the oil (very high temps) and a lot of the guys that track them love the T6, subject to it being changed often enough. Just change the oil regularly... whether it's M1, Motul or Rotella. They are all excellent until the additives start wearing out.
Having said that, the T6 is more stable at high temperatures than the M1 (with our inadequately-sized oil cooling capabilities on the C63 this is IMHO a big plus), and in terms of HTHS and wear protection, the T6 is near the top of the pecking order and I like it a lot for flat tappet engines like the M156. And, at half the price of M1, you can afford to change it twice as often, which is key to having the best engine protection. I wouldn't run it year-round in Canada (my C63 is my DD), but that's what I run in my "massaged" summer toy P-cars that only see ~3000 fairly-hard-run kilometers in warm weather between oil changes. I've never seen cleaner engines in my life, and the wear protection of the T6 is second to none.
Just my $0.02. BITOG is an excellent resource on the topic, as are some of the Nissan GT-R forums. The GT-Rs are brutal on the oil (very high temps) and a lot of the guys that track them love the T6, subject to it being changed often enough. Just change the oil regularly... whether it's M1, Motul or Rotella. They are all excellent until the additives start wearing out.
As a VERY GENERAL rule of thumb... if you track or drive the car hard enough that your oil cooler fan turns on, I'd dump it every 2K miles at the most. If you mostly drive short distances, I'd dump it every 5K miles. If your daily commute involves driving 45 minutes each way to and from work over a nice twisty road, I'd change it every 10K miles at which point it will likely still be in better shape to provide adequate protection than in either of the previous two examples.
As a VERY GENERAL rule of thumb... if you track or drive the car hard enough that your oil cooler fan turns on, I'd dump it every 2K miles at the most. If you mostly drive short distances, I'd dump it every 5K miles. If your daily commute involves driving 45 minutes each way to and from work over a nice twisty road, I'd change it every 10K miles at which point it will likely still be in better shape to provide adequate protection than in either of the previous two examples.



As a VERY GENERAL rule of thumb... if you track or drive the car hard enough that your oil cooler fan turns on, I'd dump it every 2K miles at the most. If you mostly drive short distances, I'd dump it every 5K miles. If your daily commute involves driving 45 minutes each way to and from work over a nice twisty road, I'd change it every 10K miles at which point it will likely still be in better shape to provide adequate protection than in either of the previous two examples.




Is this the stuff? How to add it? Anytime or on oil change? How much to add?
Sorry for the questions, but I plan on keeping the car forever, so engine longevity is high on my list.
That's got to mean something. You are putting your engine at risk for no good reason. A quality engine oil will provide enough protection to have the motor internals outlast most other parts of the car.



