Well folks, I own a 2001 Dodge Stratus SE sedan with 2.4L engine. Since I live in Europe (Germany) there are no speed limits on some highways (Autobahn). What I was wondering and scared the hell out of me is the abnormal fuel consumption when driving above 90mph. Till 70mph the fuel consumption is somehow accepatable. On speeds up to 110mph the Stratus fuel economy decreases to 8miles/gallon. So after a 150miles drive at that speed my gas tank is dry!!! I'm not driving a VIPER with 500bhp Is there something that could be done? Just don't tell me not to exceed the 70mph.
Thanx for any ideas and suggestions.

 

That is pretty much normal. Fuel consumption goes up exponentially, as you not only have to keep that momentum, higher rpms, but your engine has to also overcome the additional drag that those speeds create. You have a 4cyl engine, which has to work harder to overcome drag at higher speeds than say a 6 or 8 cyl engine. That 500hp viper, may well do BETTER at extreme speeds than a 4cyl Stratus. I know it's not the answer you want to hear, but if you want to have good mileage, your best bet is to just simply slow down.

You will get your best mileage immediately after Torque converter lockdown in your highest gear (60-70mph on my '00, 75-80 on my '03 T&C), as you go faster than that, you are straining your engine more.

If you really do want to improve mileage at high speeds, there are some things you can do, but they involve modifying the aerodynamics of your car, such as adding a boat tail to the back, smooth plating on the undercarriage, and smooth hubcaps. This link http://ecomodder.com/forum/fuel-econ...ifications.php shows the more effective methods, but not all will apply to a Stratus obviously.