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What sort of mpg are people getting out of the Avant? Since picking up the car (5000) miles or so ago, I’ve averaged 16.2.

For some reason (lack of turbos for example) I thought it would have been better than my old RS6 Avant as that hovered around the 16.8 mark.

I hope you are running on high octane .....

After 1 year (car registered 27/04/06, happy birthday!!) and 10,000 miles on BP Ultimate the best is 25.4mpg (on run to Center Parcs last week), worst an indicated 5mpg crawling through traffic near work. Average about 20mpg
Wife not too impressed, she's getting 40mpg plus from A3 2.0 TDI sportback.
Biggest shock though was paying Gordon's £300 for tax disc last week, won't make me sell it though!!

Andyuk911 – thanks for the response, I only occasionally run high octane (one in ten tanks or so), will things (apart from power) improve if I always go for the super stuff?

I only use super, and have got an average over 7000 miles of 17.9, I get regular 24 on long journeys but as most of my mileage is local driving, high 16 is norm.

After 5000 miles getting an average of 20.2 mpg. Seeing a regular 24 mpg on long motorway runs. Use a mix of regular and high octane.

2007 Avant, and with 200 - 300 kg of kit onboard, 70% of the time

The engine works best on high octance, OTHERWISE the ignition timing is retarded to stop pre-ignition. This equals lower power.

I sometime use BP102 (£2.42 1l)

Your car will be slower than mine

Additionally, Shell V-power (99 octane) and BP ultimate(98 octane) have cleaning agents ... I have seen an Audi A8 run one bank normal and the other BP Ultimate and the difference was amazing.

vpower s best for HP gains, as far as MPG, i dont care, on the track its hillarious...mmmmmmm 4th gear/8200 revs 227KPH yummy Eastern Creek main straight rs4 is heavan

Thanks all for the responses.

Going to give the higher octane stuff a go from now on – what’s a couple more quid a tank in the scheme of things!

last 3 cars i had only ever used optimax or now v-power you are talking 60 x 0.05p per litre difference on price as an average, thats £3 more per tank?? for me always been a no brainer....

I have not found the way to drive properly yet to get consistant fuel readings. I am sure though that running on cruise is heavier on fuel, I had the same experience in the previous 2 S4's.

Afanargoed wrote:Thanks all for the responses.

Going to give the higher octane stuff a go from now on – what’s a couple more quid a tank in the scheme of things!

Don't be disappointed if you don't see any improvements instantly, it takes a few tanks for the engine to adapt!

Dave

I get about 24mpg on longer cruises and about 17 on mixed hard and cruise driving.
I always use high octane stuff.
Oh and by the way the fuel that provides most power? Tesco 99 would you believe.

Autoexpress article last year backed up by the guy who ran the test (Vixpy of PH fame)

Andyuk911 wrote:I sometime use BP102 (£2.42 1l)

Unless you have had a re-map, specifically for 102 RON, then you wont actually gain any benefit from using BP 102.

Andyuk911 wrote:Additionally, Shell V-power (99 octane) and BP ultimate(98 octane) have cleaning agents ... I have seen an Audi A8 run one bank normal and the other BP Ultimate and the difference was amazing.

BP Ultimate is 97 RON, not 98. Futhermore, BP Ultimate has been proven, in two independent tests, to be worse than Tesco 99 (which is also the official fuel of the British Rally Championship) and also the now obsolete Shell Optimax (98 RON).


BTW, I started with about 24mpg, whilst running it in. But as I open her up, it's starting to drop - about 18mpg ATM.

Teutonic_Tamer wrote:

Andyuk911 wrote:I sometime use BP102 (£2.42 1l)

Unless you have had a re-map, specifically for 102 RON, then you wont actually gain any benefit from using BP 102.

Andyuk911 wrote:Additionally, Shell V-power (99 octane) and BP ultimate(98 octane) have cleaning agents ... I have seen an Audi A8 run one bank normal and the other BP Ultimate and the difference was amazing.

BP Ultimate is 97 RON, not 98. Futhermore, BP Ultimate has been proven, in two independent tests, to be worse than Tesco 99 (which is also the official fuel of the British Rally Championship) and also the now obsolete Shell Optimax (98 RON).


BTW, I started with about 24mpg, whilst running it in. But as I open her up, it's starting to drop - about 18mpg ATM.

Now I am confused?

I thought we were supposed to run these on the best fuel we could, but I read your comments as this is not the case?

Please put this into plain english, for me at least.

Thanks