Originally Posted by luder888 (Post 25318400)

I've been taking most short trips (< 5 miles) for the past week and I've noticed my mpg averages only about 15 mpg at best. I do drive pretty aggressively but by no mean extreme. I drive in D mode. These are mostly morning trips with a cold engine.

At first, I wondered if my recent alignment was the cause, since I don't remember getting such poor mileage prior to my alignment.

So yesterday I did a test on the freeway, with engine warmed up, cruise set to 70 mph and in a 10 mile stretch I got 37 mpg from point A to point B, and 33 mpg from point B back to A. I reset the trip meter only when I've reached the set cruise speed (so the extra gas to get the car up to speed is excluded) and I measured both ways to account for any changes in elevation or wind speed.

My question is, is that HUGE of a variation in mpg between city driving and highway normal? Is everyone else seeing this?

Originally Posted by 18A5SB (Post 25318631)

I have seen that difference too. In my suburban driving I am averaging 26 mpg, and highway I have seen 34mpg.

Originally Posted by JD15 (Post 25319624)

You must have a special S5 Eco edition to get that mileage.

Originally Posted by JD15 (Post 25319624)

You must have a special S5 Eco edition to get that mileage.

Originally Posted by JD15 (Post 25319624)

You must have a special S5 Eco edition to get that mileage.

Originally Posted by belzebutt (Post 25319807)

I got 32.6 mpg (7.2l/100 km) on my S5 the other night on my regular mixed city/highway commute, but it was late at night and I was really hypermiling. It's possible though, with more typical driving I can get 8l/100km and if I have a little fun it's more like 10. It's all in how slowly you accelerate, hit those green lights, and stick close to 50 mph (although on the highway I was doing more like 65).