Quote:
Originally Posted by JNoSol
The M3/M4 S55 engine makes more power per liter and have no issues with burning oil. I think the S55 uses different piston rings technology and I know they have an oil catch can built-in that recycles blow-by oil. Perhaps the next gen M5 will adapt this technology.
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The S55 uses the same piston rings as every N55 which pre-date the S63TU rings by many years. The rings in the S63 are found in the N/S63TU2, and N74B60/B66/B66tu. S63TU does have individual catch cans for each bank.