Last summer, I was getting 27 to 28 around town and 30 to 31 highway, all on B100 homebrew. When I drove 300 miles to pick up my 240d. The return trip was 100% dino diesel and got 33.4 mpg. I can live with the reduced mpg as I make my own for $.68 / gal.

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'83 240D 264k on 100% biodiesel/ 31mpg
83 300D 217K the $800 gem
'82 300D 267K the new WVO project car finished and driving for free
International tractor B275 on B100
Ford 555 backhoe on B100
Sargent 25 ton Rough Terrain crane on B50