I think you could get 24 from a decent 4.6... if you reset the trip once up to speed
Hello, that's "Mr. Bellend" to you.You should get around 18-25mpg out of a V8 depending on how healthy it is the former being town the latter motorway
Contrary to popular belief if it is doing less than 16 it has an issue..
Unless you're driving like a right bell end.
Mine averages this..
In a mixture of town and A road driving, I reset it every fill up..
Turns out my trip is rather accurate the best i've got is 26 which ain't bad for a pushrod V8
Mine's showing 10.2 avg.
All local short runs, no motorway or A-Roads. <1,000 miles per year.
I get about 325miles to a tank, brimmed to the light coming on. I always get about 75litres in back to the brim.... so finger in the air look to the horizon and shade my eyes against the setting sun maths gives me about 20 to the gallon. Might be a bit more on a long motorway run, probably a lot less chugging through the town.
Almost brand new engine though. Less than 10K miles since complete rebuild.
Almost brand new engine though. Less than 10K miles since complete rebuild.
300bhp/ton
Well-Known Member
RangeRoller dt
Well-Sprung Member
At 60 psi 
Datatek
Well-Known Member
He hasn't noticed that he has actually got a diesel.
RangeRoller dt
Well-Sprung Member
In all fairness we don’t how steep a slope he’s going down and wether that’s in neutral with windward
norseman
Well-Known Member
Short runs with their associated cold starts are a killer. I once had a 3.5 efi auto that returned 7mpg (brim-to-brim check) because I had no choice but to use the car for a week of 5 mile single journeys in the middle of winter.Hello, that's "Mr. Bellend" to you.
Mine's showing 10.2 avg.
All local short runs, no motorway or A-Roads. <1,000 miles per year.
Real world example for us. 196 miles round trip mostly motorway and A roads. 45 mins traffic snarl on the M25 due to broken down lorry. Lots of stop/start crawling for that section.
First half of the journey was pulling an empty 700kg trailer, second half was pulling 2.7 tonnes of trailer with a P38 on it.
Brimmed it at the same pump before picking up the trailer and after dropping the trailer off. Tyres inflated to 28 front, 38 rear.
12.8 gallons of petrol used giving average consumption of 15.3mpg for the trip.
First half of the journey was pulling an empty 700kg trailer, second half was pulling 2.7 tonnes of trailer with a P38 on it.
Brimmed it at the same pump before picking up the trailer and after dropping the trailer off. Tyres inflated to 28 front, 38 rear.
12.8 gallons of petrol used giving average consumption of 15.3mpg for the trip.
I'd be happy with that, I trailered an AA van back from north of Glasgow, empty up to collect. My 3.5 V8 110 did 9mpg overall
Stop-start traffic & the trailer probably lowered it quite a bit.
I generally get 15-16 around the local area, but last year doing regular runs from Langley to Ferndown was definitely averaging 19-20 assuming no holdups on the M25-M3-M27.
