I'm still chasing down my MPG issues. I get about 20mpg, but I have a heavy foot.

Like yours, mine runs smooth and I have great power. No smoke and little blow by. Cranks like a dream, even on a cold morning.

I just haven't had the time to pull the injectors or do a compression test.

Your other items to look at are brakes and bearings. Check to see that all wheels spin with ease. I've determined the brakes aren't dragging, but I'm not sure about my bearings. The driver rear center cap had a slight but of grease on it but with the wheel off, doesn't seem to be leaking on the hub. Strange. I've cleaned it and continue to monitor.

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