Mileage Specs 240/300D

What is the manufactures advertised MPG on the 240D and 300D?

Did this vary depending on the model year?

While negotiating the purchase of a 240D with WVO installed the seller said, he had just purchased a 1983 300D that got better fuel mileage per gallon. I thought this odd considering the 240D is a 4 cylinder and the 300D is 5 cylinder. Would use of the WVO system in the 240D somehow cause this to occur or is it more likely something else causing this to occur? Would the vehicle the 240D get better gas mileage if run solely on diesel fuel?

Thanks.

Forums

Diesel Engine Specific Aid

Chassis Model Number

W123

More a function of rear end (final drive) ratio

Turbo models have a lower rear end ratio than non-turbo models. Thus turbo engine rpm is significantly lower at freeway speed. Other than issues with engine health and tuning - this is the primary reason why you see better MPG numbers with a 300D turbo.

1982 240D WVO conversion MPG

I'm in my 2nd year running WVO via Kent's single tank conversion. I see no difference in MPG except I really don't care what my MPG is on WVO since my fuel costs are $0 .
I'm curious about your handle "Seadog". I had a fellow musician at NORAD who we called seadog, could this be the same? I helped him purchase a 190D in the early 70's