Real life fuel range

Post by **MPS** » Tue Jul 31, 2018 11:04 am

I'm looking at moving onto a C7 RS6 in the next month or so. I often have to do a 350 mile round trip returning home late in the evening. My previous C63 and current X5M struggle to complete this on a full tank so it's a pain having to stop late at night to refill to get home.

Realistically could I achieve 350+ miles trip on a single tank travelling at the speed limit on the M1/ A1 and M25?

Thanks.

Post by **J66kco** » Tue Jul 31, 2018 11:51 am

From my experience not even close. But I have never sat at speed limit for a 350 mile trip

Post by **doodlebug** » Tue Jul 31, 2018 12:10 pm

Agreed, that's going to be on the limit.

Post by **Daveperc** » Tue Jul 31, 2018 12:24 pm

If you really mean sat at the speed limit the I would say comfortably.

You should get 25MPG at that speed, which is 63 litres for the 350 miles, well within capacity.

Dave

Post by **innercry666** » Tue Jul 31, 2018 12:29 pm

I've had just over 350 miles to a tank of fuel when doing motorway miles across a couple of journeys so should have the range to cover a single 350 miles journey.

Post by **EmilA** » Tue Jul 31, 2018 1:13 pm

Defiantly possible. I did Brussels to Birmingham and had 130 miles left on the range and about 1/3 of my tank left. That includes some traffic plus not driving at the speed limit either. Computer said I nearly got 28mpg too!

Post by **doodlebug** » Tue Jul 31, 2018 1:15 pm

You should've all bought diesels.

Post by **DaveBee** » Tue Jul 31, 2018 3:53 pm

If you really do sit at the speed limit then I would say 350 miles is easily possible.

Bet you can't though

Post by **MikeFish** » Tue Jul 31, 2018 5:48 pm

If you can do 350 miles without putting your foot down you are a better man than me.
obeying the speed limit isn't all you need to do though. Sometimes you will be running at 40 or 50mph then a gap will appear. How will you accelerate to 70? If anything like me then that tank won't last 350 miles.

Post by **MikeFish** » Tue Jul 31, 2018 5:49 pm

PS I get less than 200 to a tank but I try not to get to the red on the fuel gauge.

Post by **wildbore** » Tue Jul 31, 2018 6:48 pm

350 is easy if you are sensible and it is mostly motorway / dual carriageway. The good news is that fuel economy doesn't appear to be adversely affected until you go over 80mph on the motorway. I have tried runs at 70 and 80 (and even 65 - God! that was grim) and the fuel economy was pretty much unaffected. I noticed things tail off at 85, and 90-100 knocks the economy for six completely. 80-ish is my preferred cruising speed - that way I don't have to worry about cameras on bridges or by the roadside. ACC knocks some of the fuel economy off, but worth it for the relaxing drive.

Post by **gsc** » Tue Jul 31, 2018 8:01 pm

Really easy. Did Newcastle to Warrington and back yesterday and still have 100 miles range in the tank, albeit the tank was brimmed before I left -10 miles between station and home. So that’s over 170 miles each way and before people say I was crawling all the way, did it in less than 2.5 hours each way. 30.7 mpg average.

Also got from Festival of Speed to Newcastle on one tank! 345 miles, 5 hours including 30 mins sat on the M25, 80 mile range left in tank

Pretty sure the RS7 tank is the same size as the ‘6, also running APR stage 1

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Post by **harrier** » Tue Jul 31, 2018 11:41 pm

gsc wrote: ↑
Tue Jul 31, 2018 8:01 pm
Really easy. Did Newcastle to Warrington and back yesterday and still have 100 miles range in the tank, albeit the tank was brimmed before I left -10 miles between station and home. So that’s over 170 miles each way and before people say I was crawling all the way, did it in less than 2.5 hours each way. 30.7 mpg average.

Also got from Festival of Speed to Newcastle on one tank! 345 miles, 5 hours including 30 mins sat on the M25, 80 mile range left in tank

Pretty sure the RS7 tank is the same size as the ‘6, also running APR stage 1

Its short journeys and stop start that, as ever, is the killer.
Assuming 70 litre tank (excluding reserve) and doing the maths, GSC, on your FOS trip, if indeed you could have done another 80 miles, you got just over 27mpg (6miles/L) and Wildbore, above, when you are managing 350 miles on a tank, you are getting just under 23mpg (5miles/L).

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Post by **Anth** » Wed Aug 01, 2018 1:24 am

I'm not being funny here ... But .. Wtf buys a RS for mpg anyway :-/ I get about 11mpg from mine I'm sure I've been on 4 cylinders once though

Harrier, be a gent and stick Your thoughts on the DMS map on my mapping coin thread please

would be great to hear your thoughts on this .

Post by **FaisalJ** » Wed Aug 01, 2018 6:34 am

Jerry can.

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