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      02-23-2016, 06:27 PM   #9
SSR Performance
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Drives: S55 -F80 / N54 -135i / N55-535
Join Date: Sep 2015
Location: Orange County, CA

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Quote:
Originally Posted by hunginator View Post
Would the N55 benefit from this service?
The N55 uses valves as idle control and throttle stays open mostly. This means carbon does not tend to build up as much. So from the n55's we have seen, yes there is some build up, not in the same league as the n54's. Possibly for a high mileage n55 but other than that the new n55 and s55 engines are pretty efficient.
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