Double checked mileage from house to work today. Google maps says 12.4, my odometer says 12.2. At that rate (if even google is accurate) I only lost about 10 miles on the odometer for the last fill up. Which would've only provided a net gain of <1mpg.

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'95 E320 Wagon
'85 300TD "Puff The Magic Wagon" - SOLD
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition - SOLD
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter