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E46 Engine Swaps
Replacing your motor? From direct replacements to more exoctic engines, if it's going under the hood of an E46 3 Series this is the forum to discuss it.

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Old 09-05-2019, 11:30 PM   #1
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My Ride: E46 318i
N42 swap for M54

Have a 318i which I recently did an engine swap for a 325i M54. The fuel consumption has go up significantly even on cruising speeds. Am wondering if I need to recalibrate the fuel consumption after doing the engine swap.
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Old 09-14-2019, 07:03 PM   #2
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That makes sense. M54 consumes more fuel than N42.

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Old 01-08-2020, 07:16 PM   #3
DJ J-Cue
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My Ride: E46323ci convertible
Year: 2000
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i have e46's with both those engines. there is a huge difference in fuel consumption. the M54/M52's needs its own fuel tanker running behind it.
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