VM

The thing is, the 58L gas tank is probably... very good... with some of the more efficient European engine offerings. It's not so pretty with an S4 in North America...

VM

One thing that's interesting is the ethanol status. In southern Ontario, for example, with Esso (hey, I like my PC Optimum points, plus I live literally next door to one of their stations), the stations that have 87/89/91/93 (i.e. in the GTA) have ethanol in the fuel while the stations (outside the GTA) that have 87/89/91 don't have any ethanol in their 91.

Once, I let my tank run fairly low (by my standards) and filled it up in Collingwood with the non-ethanol 91 and I ... got the impression fuel economy was better. Very unscientific though, obviously.

Glisse

So you would think, but they use a 40 litre tank with the 4 cylinder diesels - similar range

And speaking of tank sizes, the 252hp (EA888 Type 3) engine uses a 58 litre tank, whilst the 190hp (EA888 Type 3-B) uses a 54 litre tank. Everywhere except in the North American region apparently. Most amusing.

VM

Oh interesting... I always presumed they had one tank size, which was if anything oversized for the 4 cyl. diesels and undersized for the gas S4.

The thing is, I think 58L is on the small side by North American standards. The Infiniti Q50, for example, has a 76L... but they also abandoned the Mercedes-sourced turbo I4 they had for a while in favour of a 3.0L turbo V6 as their smallest engine option, and that engine is a lot thirstier than the 252HP A4 engine. The Lexus IS has 66L; Cadillac ATS has 60.5L; the Genesis G70 has 60.2...

PghRich

I suspect they want as small/light a system as possible to get about 500mi highway. That seems to be a fairly common benchmark.

Glisse

^^

As the efficiency of the engines improves, the tank becomes smaller. So you are correct, they are targeting a range.

When the first B8 A4 2.0 TFSI came out, it had a 65 litre tank, at the facelift down to 61 litres. B9 at 58.

The 3.0TDI diesel is the long distance car - 58 litre tank, range 1350km / 840 miles. Need to drive it on a flat highway with a constant throttle to get that though. But if predicted range is the criteria, that's the B9 winner,

Phenomenon101

Range: 820 KM
Fuel: Premium (91) - Canadian Tire

calbear92

2017 Season of Audi A4 Quattro

dbias

My 2017 A4 usually says 525 distance to empty. I use Shell and Sunoco 93. However it is calculated based on average mpg over the last tank so how and where you drive affects this. I think the range on this tank at highway miles is ok. I had a 2015 Passat TDI and I got several 900+ mile tanks out of its 18.5 gallon tank and I'm no where near that tough.

Onewolf42

That math does not come close to working with either the short term or long term fuel mileage reported by the car. Even if you assumed the entire 15.3 gallon tank was usable in order to have a 525 mile range your "average mpg" would have to be 34.3 mpg. At my last fuel fill, my car shows long term fuel economy is 29.3 mpg and the range was 540 miles (35.3 mpg). I think the Audi calculated fuel range is artificially inflated to make the owners feel good and it has ZERO bearing on reality. My car consistently has the low fuel light come on around 350-360 miles and it then takes ~12 gallon to fill (360/12.0=29.2 mpg). The fuel range _should_ say something like 388 miles (29.2 * 15.3(fuel tank size)-2.0(reserve)) = 388 miles. Not 540 miles. Audi Engineers should be ashamed. Shame. Shame. Shame.