Monaro - What mpg are people getting?

[phillg]

V88Dicky said:

phillg said:

v88dicky said:

averaged 31mpg on a run down to Dorset last December (using the cruise set at 73mph), long distance drive of about 370mls.

Was the Journey all down hill

Of course it was all downhill, I was driving South!

I thought as much.Mine only does about 9 going uphill.

[Hex]

I avg about 22 back and forth on my daily runs.

Though I was impressed with my run home last time from Worcester to the North east.

[rocklandboy]

Hex, what was significant about the last run? Good MPG or the lack of time in doing it???

[Hex]

I was just happy with the mpg LOL.

Normal run home, 85 Lepton cruise and then thru a few 50 avg speed check areas. Distance about 220 miles.

[wolfracer]

Hex said:

I was just happy with the mpg LOL.

Normal run home, 85 Lepton cruise and then thru a few 50 avg speed check areas. Distance about 220 miles.

I don't get it.
Mines the same colour as yours and everthing, but you can get neigh on 30 mpg by nailing it upto 85?!
I can't get 30 mpg now even at 55mph constant!
Think mine was a friday afternoon shift build.......

[the_ferret82]

my completely standard CV8 and my rather heavy right foot gets me aobut 18mpg on average around town and on 30 mile runs. but i have once had it read 26mpg on a nice motorway cruse.... ish.

but on the other hand i have a fun V8 what cares what mpg you get when you can have so much fun.

[Hex]

wolfracer said:

Think mine was a friday afternoon shift build.......

I had a few minis like that.. all teh other ones where monday morning jobs

[aruck]

Im amazed everyone get such high figures from such a big engine.Thats good news!

[crisisjez]

wolfracer said:

Hex said:

I was just happy with the mpg LOL.

Normal run home, 85 Lepton cruise and then thru a few 50 avg speed check areas. Distance about 220 miles.

I don't get it.
Mines the same colour as yours and everthing, but you can get neigh on 30 mpg by nailing it upto 85?!
I can't get 30 mpg now even at 55mph constant!
Think mine was a friday afternoon shift build.......

Thats where you are going wrong, the car seems more economical at between 80 and 90 unfortunately

[broadslide]

^^WHS^^

[kjmac]

broadslide said:

^^WHS^^

And again, at more reasonable velocity I did once average 28.9mpg over 250 miles in my 6L.

Only once mind.

[after_shock]

Mine always averages 23.? always stays in the 23's im sure the gauge is broke lol

[ringram]

Done about 7000 miles with the new engine, just under 22mpg, that includes dyno days as well as M4 snail work over easter etc. Mixed city and motorway driving. Not bad IMO. The stock vxr8 was around 24mpg.

[RedHot]

I'm lucky if I see 20mpg.Too much town driving
and no decent runs.

[Ferb]

I drove 150 miles at Donington park and used 100 litres

[hsv_rulz]

05 CV8 S/C'd. I've had my average around 8mpg
When I wear the lightweight right foot I have had 28 - 30 mpg on a good m'way run.

[AdeTuono]

Ferb said:

I drove 150 miles at Donington park and used 100 litres

Well done! That's the target right there then.

[v8-alg]

dont know whats going on with my vz cv8 but my average is 13.5 and it never seems to change! i only have a remap but its my daily driver and i do most of my driving in milton keynes so lots of stop start driving. I have started to get annoyed at how slow it is feeling so i do tend to give it some probably my heavy right foot!

[wolfracer]

crisisjez said:

wolfracer said:

Hex said:

I was just happy with the mpg LOL.

Normal run home, 85 Lepton cruise and then thru a few 50 avg speed check areas. Distance about 220 miles.

I don't get it.
Mines the same colour as yours and everthing, but you can get neigh on 30 mpg by nailing it upto 85?!
I can't get 30 mpg now even at 55mph constant!
Think mine was a friday afternoon shift build.......

Thats where you are going wrong, the car seems more economical at between 80 and 90 unfortunately

Yes I agree that at the speeds mentioned it only takes very small throttle openings to maintain that speed so it does seem you're not using much fuel - it's like a nice "sweet spot" for the motor. Unfortunately, thousands of motorway miles in the Ro has proved to me that lower speeds do equal better mpg, it's the beginning and end when you're WOT that makes all the difference, but thats the fun bit!

If anyone can prove to me Jez's suggestion will save me money, I might change my driving style

[ringram]

Could be something to do with SC setups.
Off boost they could suffer as the intake sucks and isnt tuned like the stock composite intake.
Its got a crusty intercooler stuck in the middle and short runners.

On boost volumetric efficiency is better and the intake tuning doesnt matter so much. So perhaps light boost around 80 etc works best for SC's

I made that all up, but you never know

On that basis a centrifugal might be better for economy as it retains the stock intake.