A few questions about my new 300TD

[robbsclassics]

I just got an 85 300TD about a month ago. It was a good deal, and not too much rust. I have fixed a few things but, just don't know about a few others. I have to research more on the tranny, tach, cruise, vacuum leaks, running hot, AC, among other little things.

My main question is fuel milage. I am getting 22mpg, which I think is low. I would like to get 30mpg, is that possible? Also, what would the original gear ratio be? I know I'm off on my speedo, so maybe a taller rear affecting my mpg? My car seems to love heating oil more than diesel also (less nailing, smoother idle), anyone know why this is...sulfur content? (Same mpg with either.) I know it needs to have the valves adjusted, a compression test, and new injectors (I'm pretty sure the originals are still in @ 290k.) It idles a little rough, but is relatively smooth on the road. I will look into the tranny slamming into gears as soon as I get the engine smoothed out.

Besides these problems, I love the ride, options, space, and looks I get. I took it out on a dirt road, and my LSD rear and ABS works great. Now if only I could do a cheap 5 speed conversion....