I have a 1984 300d Turbo Diesel. I was under the impression that these cars would get 28-30 miles per gallon. I am getting at best 24. The car has 244,xxx miles on it. It drives great and has been very reliable. Would an old timing chain cause the fuel delivery to be off? Just throwing out ideas. Any ideas about this? What are you out there getting on similar vehicles?? Thanks for any help or things I should look at that may be causing the lower mileage. I am not complaining at 24, I just wanted to see if there is something may be causing this mileage that may need repairing. Thanks again.