Efficiency improvement simple, you are wasting less heat from combustion in to the cylinder walls/ head.
+ other things.
I didn't believe it at first, but it is true.
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2016 Tesla Model X
2022 Sprinter
Gone 2012 Tesla Model S P85
Gone 2013 Nissan LEAF SV
2012 Nissan LEAF SV
6 speed ALH TDI Swapped in to a 2003 Jetta Wagon
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