The Subaru 2.2 WBX conversion is 15% more efficient than the original VW 2.1
WBX.

In May of this year, my wife and I drove our '86 Syncro Westfalia (VW 2.1
WBX) and our '86 Syncro Doublecab (Subaru 2.2 WBX) from MD to Ontario;
travelling in convoy for 842 miles (1,348 km). The Subaru conversion
averaged 22.7 mpg (10.34 l/100km) and the VW WBX averaged 19.2 mpg (12.25
l/100km). We used the same gas and filled up at the same pump at the same
time.

-Larry

> I was a little surprised to hear some of the MPG quoted with engine mods
> and conversions.