What V8 has a respectable MPG?

[cptsideways]

I got 26mpg out of a 6.7L V12 twin turbo on a 120mile round trip the other week.

But back to reality, Lexus V8's seem quite capable of returning 30mpg on a regular basis.

[Cledus Snow]

redgriff500 said:

No production V8 driven in real world conditions gets anything like 30mpg.

A family friend with a '65 Mustang, (a 289 2v Fact fans ) claims to have got 30 mpg on a run from Norwich to somewhere in Sussex.

I worked out my old Chevelle was averaging 14mpg on a run. Never bothered with the maths on my Firebird or Cougar as i probably won't like the results.

[Marquis Rex]

Efbe said:

Well there seems to be a lot of people spouting sh!t and speculating quite a bit, so i'll throw you in some real world data.

Background:
www.fuelly.com is a website in which users update their mileage and fuel used every fillup. I myself use it, and it works well.
the data submitted is not manufacturers pipe dreams, and there is no incentive for people to lie on there, as it would just mess up your next data input.

Below is the report of Corvette v8s from all years:


For more detail (including by year and specific cars) go here:
http://www.fuelly.com/car/chevrolet/corvette/gas%2...

Interesting. I love sites like that. I have one in German but for smaller engines and in litres/100km. Is that US miles per gallon or Imperial?

[FRMATT]

My dads Alpina B5 shows about 25mpg average, the only time it was reset was when the i-drive packed in and it had to be replaced. It's done about 105k miles now

[SWoll]

Another "300 having an argument" thread.

Why wasn't I notified? Feel like I've missed out on something now.

[Mr Gear]

Marquis Rex said:

There's NOTHING reasonable about what you say here at all. If you were reasonable you'd realise that. The original poster asked for a reasonable fuel economy V8 and then laid down some rough guidelines. you then interject because it doesn't meet your own ridiculous guidelines. That's about as reasonable as saying electric cars are cost effective and better for the environment while convenienmtly ignoring how the energy got to the plug or the fact that the battery packs are heavily subsidised in the USA to give them an economic advantage.

I feel in no way obliged to be reasonable with you because you fail to ever extend the same courtesy to me.

Marquis Rex said:

The original poster asked for a reasonable fuel economy V8 and then laid down some rough guidelines.

One of these guidelines was 30+mpg. So far, we have not had a suggestion that really comes close. We've had a few people that have quoted mythical "highway" figures. We've had caveats such as "but it has lots of power" but we've not actually had one good suggestion along the lines of the original request.

[Caulkhead]

Marquis Rex said:

Your argument is flaweed, I left that festering socialist Gulag of an Island years ago

And now live in the Obama-ised socialist republic of America complete with ridiculous gas-guzzler taxes, the forced redistribution of people's income to fund electric cars, a down-graded credit rating and the world's largest market for Prius'. Might as well have stayed at home!

[Marquis Rex]

SWoll said:

Another "300 having an argument" thread.

Why wasn't I notified? Feel like I've missed out on something now.

Actually 300bhp/ton is being quite 'reasonable'. I think most of us agree that Mr Gear is being the troll like tt yet again!

[Six Fiend]

Magical my old E34 540i auto would give a very happy 34mpg at a 70-75mph cruise.

Move it up a bit and I could still get 30mpg easily.

Playing jolly tunes with the loud pedal on A or B roads back into the mid to high 20s.

Town work only would see around 18-20mpg.

[Marquis Rex]

Caulkhead said:

And now live in the Obama-ised socialist republic of America complete with ridiculous gas-guzzler taxes, the forced redistribution of people's income to fund electric cars, a down-graded credit rating and the world's largest market for Prius'. Might as well have stayed at home!

You make a good point

[c7xlg]

My 4.8l V8 has (according to OBC, which I think is pretty accurate) averaged 25.8mpg in 80,000+ miles of motoring.

With my current daily commute of 110 miles round trip it is averaging 28-30mpg depending on traffic hold ups.

It's comsumption varies hugely depending on type of driving. Any stop/start city type driving sees the average dropping into the teens. Let her stretch her legs on some m-way or A-roads and you'll get into the mid to high 20s most of the time.

[RoseyG21]

Audi 4.2 V8 Diesel

[Efbe]

Marquis Rex said:

Efbe said:

Well there seems to be a lot of people spouting sh!t and speculating quite a bit, so i'll throw you in some real world data.

Background:
www.fuelly.com is a website in which users update their mileage and fuel used every fillup. I myself use it, and it works well.
the data submitted is not manufacturers pipe dreams, and there is no incentive for people to lie on there, as it would just mess up your next data input.

Below is the report of Corvette v8s from all years:


For more detail (including by year and specific cars) go here:
http://www.fuelly.com/car/chevrolet/corvette/gas%2...

Interesting. I love sites like that. I have one in German but for smaller engines and in litres/100km. Is that US miles per gallon or Imperial?

marquiz, This data is in UK MPG, there is an option on the top left to change it to other ones.

I believe the one you are talking about is http://www.spritmonitor.de/. If you sign up to this (free) then you will get the option to change the metrics into UK MPG. much more useful than having to convert it each time!.

I use fuelly for US/JAP cars/bikes and Spiritmonitor for EU/Other cars/bikes. They work well together

Edited by Efbe on Wednesday 23 November 15:24

[Mr Gear]

Marquis Rex said:

Actually 300bhp/ton is being quite 'reasonable'. I think most of us agree that Mr Gear is being the troll like tt yet again!

I'm saying that you won't find a V8 that has reasonable mpg. You are disagreeing with me, but not offering any actual examples that prove your point, and making yourself look silly again.

[redgriff500]

Johnboy Mac said:

The LS430 I understand will knock out 30-33mpg.

I doubt it.

I had an LS400 and when driven as gently as I could it got 22mpg

When I drive my Soarer I get around 18mpg

[MagicalTrevor]

cptsideways said:

I got 26mpg out of a 6.7L V12 twin turbo on a 120mile round trip the other week.

But back to reality, Lexus V8's seem quite capable of returning 30mpg on a regular basis.

26mpg from a V12 is good in my book

RoseyG21 said:

Audi 4.2 V8 Diesel

I specified petrol... I want a V8 for the noise

[Efbe]

Mr Gear said:

Marquis Rex said:

Actually 300bhp/ton is being quite 'reasonable'. I think most of us agree that Mr Gear is being the troll like tt yet again!

I'm saying that you won't find a V8 that has reasonable mpg. You are disagreeing with me, but not offering any actual examples that prove your point, and making yourself look silly again.

yet you have still failed to contribute one useful point to this thread. go away, and troll somewhere else!

[Marquis Rex]

When I used to use my 1970 Challenger as a daily driver- it used to average 6-8 mpg in daily driving!
And this is with the vacuum advance connected up, and running a reasonable advance curve. I don't know what the mixture was!
How could have they gotten it so wrong?
Still I guess it's quite competitive compared to HD articulated trucks

[Mr Gear]

Efbe said:

yet you have still failed to contribute one useful point to this thread. go away, and troll somewhere else!

You have made two contributions to this thread. One linking to a site that basically agrees with what I am saying, and the other telling me to f-off.

Thanks for that.

[The Wookie]

Mr Gear said:

I'm saying that you won't find a V8 that has reasonable mpg. You are disagreeing with me, but not offering any actual examples that prove your point, and making yourself look silly again.

'Reasonable' is subjective, this argument is pointless.