What is a 'good; cruisng speed
Discussion
I drove down the A1M very late on Saturday, I was tired and didn't want to attract any BiB typeattention (even though I'd overdosed on diet coke). SO I set cruise control to 66mph and averaged just over 20mpg over about 25miles; this was worse than I expected at that pedestrian speed.
On way home I did similar but at 75mph and got 22mpg.
What's the optimum for lazy travelling?
I'm guessing that at 66 the torque converter isn't locked up, so am losing power.
Steve
On way home I did similar but at 75mph and got 22mpg.
What's the optimum for lazy travelling?
I'm guessing that at 66 the torque converter isn't locked up, so am losing power.
Steve
Well_Fans said:
depends what car you've got - I'm guessing an auto VXR8. In the Monaro I'd expect 25-30mpg at 70mph ish indicated on a long cruise. Best I managed on 1 tank was 440 miles at cruising speed all the way.
I didn't think you could get automatic Monaros.... The R8s do seem to have a drink problem - no surprise with the weight of them.
ARAF said:
Well_Fans said:
depends what car you've got - I'm guessing an auto VXR8. In the Monaro I'd expect 25-30mpg at 70mph ish indicated on a long cruise. Best I managed on 1 tank was 440 miles at cruising speed all the way.
I didn't think you could get automatic Monaros.... The R8s do seem to have a drink problem - no surprise with the weight of them.
007 VXR said:
ARAF said:
Well_Fans said:
depends what car you've got - I'm guessing an auto VXR8. In the Monaro I'd expect 25-30mpg at 70mph ish indicated on a long cruise. Best I managed on 1 tank was 440 miles at cruising speed all the way.
I didn't think you could get automatic Monaros.... The R8s do seem to have a drink problem - no surprise with the weight of them.
I doWhenever I do any distance I sit at 80 on CC, an indicated 80 is probably around 76/77 so falls very nicely into the 10% rule, I average around 23mpg with my R8 at those speeds, measured over a 450 mile round trip last time out for any distance.
Edited by Phantom Mark on Tuesday 8th December 11:10
007 VXR said:
i fine mine is best at about 80/85
I agree (although I never exceed the speed limit myself of course). My speedo correlates pretty closely with the indicated speed on the sat nav doo-dah, I think that if I managed to stay at those speeds I would get indicated fuel consumption 28mpg no trouble, on one occasion I think I would have got about 31mpg over a 600mile round trip. The Monaro is brilliant for that kind of job.
Edited by Yertis on Tuesday 8th December 18:27
I've got a manual LS3 R8, I often take it for a 130 mile trip, about 90 miles on motorway, the rest A road with some stop start traffic. The R8 returns 26 to 27MPG and I cruise at about the legal limit on the motorway.
On the A road, if I'm not in a hurry I change up at 2500 to 3000 rpm.
My old Monaro VXR returned about 28 to 29 on the same run, same speed.
The R8 has gained a few MPG now its got a few miles on it. When it was brand new it struggled to get to 24 MPG.
Speedo on the Monaro was spot on where as the R8 is 1 to 2MPH optimistic.
Check the tyre pressures, Vauxhall (Picador) delivered mine with 26PSI all round instead of 36.
On the A road, if I'm not in a hurry I change up at 2500 to 3000 rpm.
My old Monaro VXR returned about 28 to 29 on the same run, same speed.
The R8 has gained a few MPG now its got a few miles on it. When it was brand new it struggled to get to 24 MPG.
Speedo on the Monaro was spot on where as the R8 is 1 to 2MPH optimistic.
Check the tyre pressures, Vauxhall (Picador) delivered mine with 26PSI all round instead of 36.
Is your tune standard or modified?
Depending which model you've got and who did your tune, you'll get different mpg. There's a feature known as "lean cruise" which can be programmed to kick in above certain speeds & at light load. Don't know what the standard parameters are, but you can take it for a remap and have those settings adjusted to your own requirements if you want.
If you've got a long level road near you, set the fuel read out to display instant mpg and set when the reading jumps up a bit as you gradually raise the speed from say 60 mph.
Mine kicks in just above an indicated 70 mph.
Depending which model you've got and who did your tune, you'll get different mpg. There's a feature known as "lean cruise" which can be programmed to kick in above certain speeds & at light load. Don't know what the standard parameters are, but you can take it for a remap and have those settings adjusted to your own requirements if you want.
If you've got a long level road near you, set the fuel read out to display instant mpg and set when the reading jumps up a bit as you gradually raise the speed from say 60 mph.
Mine kicks in just above an indicated 70 mph.
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