I noticed in your ad that you get 38-40 mpg. Is this driving highway, city, or mix and at what speed?

I have the same engine in an 87 190 (a much smaller car) and I am getting at the most 27 mpg. I've been told that I either need a new timing chain or injectors. I have about 173,000 miles on the car. The car runs very well and there is very little exhaust noticable except under very hard acceleration. Any clue?