I picked up my S4 and love it. Especially the deep exhaust note you can hear from inside the cabin. I do have a few questions though and am wondering if other S4 owners can help answer them.
1) Whenever I start my car, when I shift into drive, I feel a little pulsing on the gas pedal. It only happens when the car is started. Is this normal? Does it have something to do with the brake system initializing or something?
2) The gas mileage is horrible. Will it improve as the engine is broken in? I'm getting nowhere near the manufacturers mileage or what was listed in fueleconomy.gov. And I'm driving it normally. Not gunning it or anything.
You MAY get between 18 and 19 mpg in town depending how heavy your foot is. If you are lucky and drive below 75-80 mph on the highway , expect to get 24mpg. I am now on my 3rd B8 s4. Some do claim to get better mileage but I have not seen it. I'm 64 yrs old so you can pretty much suspect that I am not tearing up the roads. FYI, if you bought this performance car and expected to get great gas mileage, you made a mistake. This car begs to be driven agressively. And when you drive it that way, gas mileage suffers big time. You will get really bad gas mileage doing that.
I get the same engine surge, now I'd know what it was if I knew what ABS was. Anti Lock Brake System? I've seen as much as 21.5 around down if you keep a very light foot. I recently did a 1200 mile road trip, Expressways up to 78mph, surface roads and then some local driving. Was also stuck in stop and go traffic for 2.5 hours. 27.5 mpg. You'll see that all the time if you stay about 55-65 mph, but who does that? I have a 2014 S4 with APR Stage II.
Can't speak to the pulse, I have a 6-speed. On mpg however, it's my experience to see a increase in mpg. I drive highways/freeway most of the time, I'm seeing 27mpg highway, 28mpg surface street....around 24mpg mixed (based on the onboard computer). I see about a 1mpg less when I hand calculate.
In any powerful car with good published fuel efficiency numbers, your own mileage will depend on how you drive the car. I'm stating the obvious, but it seems folks forget: Exploiting the power of the motor requires fuel. If you drive like Grandma you can get close (or even exceed) the EPA numbers, but most people who buy more powerful cars tend to want to use the power, so the mileage plummets.
You can learn a lot about your habits by watching the instantaneous fuel efficiency on your dash display. Just moderate acceleration from a stop results in single digit MPG, even on my Q5 TDI. But once you're only using enough power to maintain speed (cruising) the MPG will shoot way up.
__________________ Robert Cheng 2014 Q5 TDI, Phantom Black, S-Line, B&O, Nav, Side Assist
2013 S6, Estoril Blue, B&O, LED, cold weather, comfort seats, rear shade, BBS CH-R 20x9 ET25, Stasis 25.4mm RSB
2010 S4, 6-spd, Meteor Gray, Prestige, Sport Diff, Strat shifter, H&R Rear Sway -- SOLD
2000 S4, 6-spd, Brilliant Black, Stg3 & other goodies -- SOLD OEM Audi Wheel Page
It really depends on how you drive. I'm getting about 22mpg on average but it can go down to about 17mpg if you drive more aggressively however yesterday I took my wife to the ATL airport which is a 90 mile round trip and I got about 27mpg while going between 70 -85 miles with my 6-speed manual which is not bad at all. On the other hand I really don't care as long as I'm having fun with it.
2014 Audi S4 Premium+|Monsoon Gray|6MT|B&O|Nappa|Sports Diff|MMI|Advanced Key|Side Assist|19" Wheels|
2013 Audi S4 Premium+|Ice Silver|6MT|B&O|
Sports Diff|MMI|Advance Key|
2012 Audi Q5 2.0T|Premium+|White|B&O|
Advance Key|Black Leather|
2008 Audi A4 2.0T|S-Line|Silver|Nav|Xenon|
2010 Audi A3 2.0T|Premium Plus|White|
2007 VW Passat 2.0T
1999 Audi A3 1.8T