Oh my goodness! MPG C63

[V9GRT]

So, the new car has been delayed another few days and I've been lent a 'demo' 63 whilst I wait.

I expected somewhere between 16 and 22 mpg from a full tank. It has been driven 'spiritedly' but, on road so within sensible limits (ish)!

Full tank lasted 100 miles only, the odometer is showing an average of 10.6 MPG, ouch!!

The car is great :-) only criticism is that, the beautiful noise can only really been heard when 'pressing on'. As its such a capable vehicle that means, 'you're speeding'!

My car is on a 2 year pcp so ...........how can I do an exhaust mod but put it back standard for 'hand back'?

Can anyone advise what options are on the market that fit OEM and allow me to put back to 100% standard/untraceable?

Thanks Gav

[Jazzer]

That mpg is almost diesel-like.....I once had an Evo that did 4mpg, but only at weekends!!

[ecain63]

10.6mpg is low. You must have been driving it pretty hard. But hey, thats what its designed for. As Jazzer also knows, the V10 M5 can easily be taken down to single figures if driven briskly so yours is not unusual. I think you'll find when it comes to your own car that youll be driving it a bit more gently. Not only do you have fuel costs to think of but your rear tyres will defo be taking a beating if youre constantly pushing the full weight of that 6.2V8 through it. Drive it how you like, but i bet you'll be seeing north of 16mpg when it comes to your own motor, and you'll still be enjoying it.

Eddie

[Gareth135R]

Surely you beat the st out of it....100 miles from a tank

[ghibbett]

You must be caning it to have averaged 10.6mpg out of an entire tank!

As for noise, how new is the demo car? They get noticeably louder with miles.

[V9GRT]

As I said 'spirited' yes! Not fully throttle everywhere, just nearly everywhere. :-)

The reason though, honestly was to hear her bark. My logic is... If I hear her at lower revs I won't need to wind all the way round?!

The new car was great sounding but not' loud', mine will have only delivery miles so no doubt the same?

Exhaust modifications, I've heard of 'cat delete' but I believe that's permanent?

Rear silencer, do they do a direct replacement that allows all body work to remain untouched?

Are there any induction modifications that increase the sound level?

Cheers

[ZeroH]

The last spirited drive I did in a c63pp.... over 42 miles of b and a road on a sunday morning, led to this

Long term average on that car is 22/23mpg tho, so clearly shows how throttle sensitive it is

[ZeroH]

ZeroH said:

The last spirited drive I did in a c63pp.... over 42 miles of b and a road on a sunday morning, led to this

Long term average on that car is 22/23mpg tho, so clearly shows how throttle sensitive it is

Crap... didn't mean to post the pic like that... anyway, it reads 9.9mpg

[UltimaCH]

Are you sure there isn't a hole in the petrol tank?

[V9GRT]

There is, I think there are 8 in total.

One over each cylinder?!! ;-)

[UltimaCH]

LOL! My C43 is no way as thirsty...

[V9GRT]

Some say it will get better with age in terms of MPG but I cant see why?

I hope so though!

I still cant get an answer on the exhaust/decat etc, does anybody know of a OEM sized solution?

[V9GRT]

Much better, it can be done, cruise control and steady :-)

[ghibbett]

Never mind the mpg, how the hell do you put up with the speed limit assist feature?! Annoys the hell out of me!!

[firesafetydave]

Just about to order my C63. Why does everyone expect decent economy out of a 6.3 V8!!
It's a car that's designed to be driven, it has a whacking great V8, why the surprise

[V9GRT]

I don't think anyone expects 'decent' economy, just that near single figures can surprise, the small fuel tank adds to the frequency at the pumps.

Hope you enjoy yours :-) with your attitude towards fuel and costs you are obviously a wealthy guy that really will enjoy the motor, they're fantastic as a daily 'sensible' car

[COLONEL_SMITH]

I have done just over 2000 miles now and I seem to get about 19mpg on virtually every journey to and from work..Strange really as the journey in I usually leave it in C and drive sensibly but the drive home I rag it most of the way..

[marky1]

I drive in S+ or M most of the time, 5km to work and 5km back, bit of driving around town and I am getting around 22 litres per 100km or 11 MPG. Lucky petrol is cheap here.

[V9GRT]

She's here :-) 1000 miles of only 4500 revs is murder!!

[V9GRT]