30 is good for a 240, but I've read that closer to 40 mpg is possible when everything is done right. I get 32 mpg with my '84 300D. I wish it had a 5 spd manual trans. instead of the automatic...could maybe get 35-40. I think fuel is going to be a real problem one if these days, like when Iran/Israel let loose on each other, or something similar.

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Diesel-guy