I'm looking to improve my 84 300sd to increase mileage with out doing massive hp improvements. I've already gone through the basics, valve adjustment, cleaned intake and ports, and EGR disabled. The highest I got was 32 mpg with 3 gallons of diesel from an empty tank. I wears wondering I put a newer turbo on her with a faster spool on, it would improve the mileage.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800