I was doing some reading on MB diesels....I rather like the 2.7L I5 that gets stuffed in Sprinters. Has very nearly the same power as my 4.3, but in a crappy monster van gets the same mileage. It even weighs the same, so the stock suspension could handle it. And it's not too big to fit, so minimal mods to install. I'd bet it could break 27mpg in my truck. Now to find one that isn't $5000....and doesn't come with the van.
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