My old 1991 Mercedes 300E got about 18/22 mpg, and took premium unleaded - currently about 3.40 per gallon. My newer 2005 Mercedes E320 (same model family) gets about 25/33 mpg, and takes diesel - currently about 3.80 per gallon.
For about 10% more money, I get about 45% more mileage.
And, it’s very cool to go 600 miles on a tank of fuel.
sitetest
It must be! With our 5.4L gas engine, we will never get that kind of mileage.
Carolyn