Actual 80mph Interstate MPG

[tshoe32]

Once you get a TDI (2001 Jetta) you tend to get hooked. I enjoy driving and would be in the catagory of "Spirited". I spent a good share of my life racing, ATV's, gokart's and motorcycles and can appreciate a good performing car. The Jetta isn't a rocket or a Porsche but it does have something about it that is addicting. The TDI can run circles around the rest of the Hybrids and still get great mpg. Now I am starting to modify mine (no DOT inspection req'd in WI) so it turns out to be a fun project car without the DOT issues. At over 204,000 miles, I still enjoy driving the darn thing.

[ChrisHo]

Originally Posted by dangrass

Of course this varies with vehicle. My 2007 Suzuki GSXR 1000 doesn't seem to care nearly as much whether I'm going 70 or 120, but I think it has a smaller frontal area than the car.

Motorcycles are notoriously bad in aerodynamics. A stock Hayabusa has a Cd of .561 and 6.01 feet of frontal area. There are modern cars with a Cd as low as .3

[dave1957]

I have Golf 2011 six speed , 5200 miles and I'm getting 46 to 51 mpg

[panda-52]

Those Golf mpg figures are great news. I'm seriously considering augmenting (not selling) my 2002 Jetta TDI with a 2011 Golf TDI but was concerned about the low in mpg. I have almost 290,000 miles on the car and have always gotten 50 - 55 mpg. The last few days I've tried driving in the high 50's and expect to better that. With the price of fuel going up daily the expected hit with a new Golf was hard to accept.http://www.myturbodiesel.com/forum/i.../separator.gif

One of the things not considered n this thread is diesel longevity and lower maintenance costs. I don't go to the dealer so your experience with VW diesels may differ.

[Keithuk]

Well I did my monthly fill up yesterday it was showing 70 miles left so I gave it a quick blast up the motorway. I realised as I was driving that I need some petrol for the lawn mower so I had to go back home for the can. Just before I arrived home it said 20 miles left. I got the can and started up and it showed 5 miles left, how as it lost 15 miles in the drive?

I proceed to the fuel station which is 4 miles away, I hadn't done half a miles and it showed 0 miles so I carried on. I get to the fuel station and tanked it as normal and it only took 54Ltr so I had 1Ltr left. I've always said that the fuel gauge drops of quite quickly once the fuel warning shows up at 50 mile.

Its gone back to the normal 42.76mpg by my calc with the warmer weather we are having.

[dangrass]

Originally Posted by ChrisHo

Motorcycles are notoriously bad in aerodynamics. A stock Hayabusa has a Cd of .561 and 6.01 feet of frontal area. There are modern cars with a Cd as low as .3

That is true, although the frontal area is so much smaller, the lousy Cd makes less difference than on a car with it's relatively huge frontal area. I suspect that on the GSXR in particular, the fuel economy is more related to revs than anything else. By comparison, the JSW never really revs much, but the fuel economy seems to deviate more as a result of aerodynamic drag, in spite of the fact that it has a much better Cd than the bike.