Fuel consumption

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Fuel consumption...

Yes it's only one single detail within the complete game, but an important one as I think.


I still here those arguments regarding visual damage of the cars ingame... "the manufacturers will not allow to show their damaged cars so we cant do that.." ...


Today the world is all about economic efficiency. Not only here in Germany.

So what will the car manufacturers say if their products fuel consumption is twice or triple as much ingame as in real-life ?

I dont think they would be happy... But still no one talks about it or thinks about it.


We do not know yet how it will be in GT5 but...

We (or at least I) do know how its been in GT4.


An example ? - In GT4 a 69 Chevrolet Corvette (fully tuned to 572 HP) consumed 49 liter for 100 kilometer (km). (average)

A bit much, isnt it?

The gas-tank of this car can hold 80 liters (ingame), so the range of this car is 163 km. A bit short, isnt it ? (Thats about 100 miles)

This is only one example but I soon realized in GT4 ALL cars had an exaggerated fuel-consumption.


GT5 Prologue does not give an indication on fuel so we can only hope that there will be an appropriate fuel consumption in GT5.

At least I hope so...
 
I don't know driving at high rpms most of the time and boosted to that much HP the vette may not get more than about 100 mile per tank.

I used to have a Firebird with a 335hp 445CID engine and at 70 mph cruising speed I could get a little over 200 on a tank but if I ran it at high rpms I would get a lot less for sure.

I also had a Fiero which got 45 mpg at 55mph but dropped to 25mpg at 70 mph
 
Interesting thought my dear Watson. Is fuel consumption actually in the game though? If there is, I'm pretty sure a lot of company would definitely be nervous about having their cars in the game.
 
I would be very surprised if it is not in there. Fuel and tires were a big factor on GT4 endurance races.
 
HBR-Roadhog
I don't know driving at high rpms most of the time and boosted to that much HP the vette may not get more than about 100 mile per tank.

I used to have a Firebird with a 335hp 445CID engine and at 70 mph cruising speed I could get a little over 200 on a tank but if I ran it at high rpms I would get a lot less for sure.

I also had a Fiero which got 45 mpg at 55mph but dropped to 25mpg at 70 mph
Click to expand...


1 US gallon = 0.264 liter
1 mile = 1.609 km

25mpg (miles per gallon) = 40.22 km per 3.79 liter

Thats 9.45 liter / 100 km

The (example) corvette ingame used 49 liter / 100 km
(12.94 gallons for 62.15 miles)

That is 4.8mpg

ehrrmm...
 
profi
An example ? - In GT4 a 69 Chevrolet Corvette (fully tuned to 572 HP) consumed 49 liter for 100 kilometer (km). (average)

A bit much, isnt it?

The gas-tank of this car can hold 80 liters (ingame), so the range of this car is 163 km. A bit short, isnt it ? (Thats about 100 miles)
Click to expand...

You're talking at race speed though. Sounds about right. Those awesome old V8s in those heavy awesome cars only get between 4-8 mpg when built.
 
but that 25 mpg @ 70mph was using a 1.7 Liter with like 1/5th the HP you have in the vette.

A 69 vette with a stock engine would get between 15-20 mpg at 70mph constant speed. Under race conditions it would be lucky to get 10mpg and with that much additional HP 5mpg sounds like a reasonable estimate.
 
sw_sephiroth
You're talking at race speed though. Sounds about right. Those awesome old V8s in those heavy awesome cars only get between 4-8 mpg when built.
Click to expand...

Alright, tommorow I'll post some standard cars... it's too much for all cars really...
 
You raise a good point about manufacturers not wanting realistic fuel consumption, but you're assuming wrongly that a car racing on a track will consume fuel within its declared specifications. 50 L/100 Km on some stock engines is very well reachable in such conditions, and more is definitely possible depending on the track and the amount and type of tuning or power the engine has got (and actually, if the car isn't moving, fuel consumption is ∞ L/100 Km)

GT4 wasn't always accurate, but it was more or less realistic. If you drove at normal (constant) speeds like you would on a highway in real life, fuel consumption was much lower than when racing.

Most likely GT4's fuel consumption was based on relatively simple formula with some correction coefficients depending on engine type, size and tuning, load (current engine power), rpm.
Smaller or modern engines definitely had better mileage than others.

Personally, I want to see real numbers and real fuel tank sizes (which could be expanded for racing use with racing modifications), in addition to a setting to change the amount of boarded fuel, but I doubt that manufacturers would want that. That's why in GT4 all cars had 80 "units" (liters) of fuel, probably.
 
profi
An example - In GT4 a 69 Chevrolet Corvette (fully tuned to 572 HP) consumed 49 liter for 100 kilometer (km). (average)

A bit much, isnt it?

The gas-tank of this car can hold 80 liters (ingame), so the range of this car is 163 km. A bit short, isnt it ? (Thats about 100 miles)

This is only one example but I soon realized in GT4 ALL cars had an exaggerated fuel-consumption.
Click to expand...

You're kidding, right? Have you ever driven a real car at full-throttle on track?

My S2000 is rated at 20/26mpg. On the track it gets 8-10mpg.
 
This might shed some light on the situation of fuel consumption in indurance racing, has some info reguarding tyre usage also. (84 corvette)

CORVETTE GOES ENDURANCE RACING

"the 1984--the new car had a 230 nhp port fuel-injection engine"
I guess this was a stock trim series..

"The Corvettes were regularly achieving as much as 7-1/2 mpg while winning."
Surely a 500hp vehicle would use more fuel.

It's an interersting read 👍

http://www.bentleypublishers.com/chevrolet/history/corvette-from-the-inside/gallery-752-34.html
 
Theoretically, if the throttle remains open as much time as with the lower powered engine and if we assume the specific fuel consumption to be the same, by doubling available power, fuel consumption is also doubled.
 
twohoos
You're kidding, right? Have you ever driven a real car at full-throttle on track?

My S2000 is rated at 20/26mpg. On the track it gets 8-10mpg.
Click to expand...

Yeap.

OP, your thinking is flawed because you're using conservative driving figures for both the highway and city, where to get those numbers you're coasting as much as possible and trying to keep the throttle under 5% load.

On the track, your fuel consumption skyrockets, this is true for every fuel-powered vehicle.

:)
 
I don't know about electrical drain, but what about temperature differences that increase or decrease efficiency? I'd be surprise if they can put that in the game.
 
I wish they'd tell how many mpg's you average, so you can test fuel efficiency in cars. I wanted to know how many mpg's my Viper was doing in GT5P. With the gear ratios set right, I ran 70mph at fewer than 800rpm. How efficient is that?
 
CommanderShepar
I don't know about electrical drain, but what about temperature differences that increase or decrease efficiency? I'd be surprise if they can put that in the game.
Click to expand...



Hmmm... I think we have confirmation that the weather conditions (humidity, temp, etc) effect the performance of the car. So, we will see.
 
CommanderShepar
I don't know about electrical drain, but what about temperature differences that increase or decrease efficiency? I'd be surprise if they can put that in the game.
Click to expand...

I brought this up in a different thread. I said I doubt it would be included, but everyone else said it was indeed possible. I hope they are right.
 
Stotty
Autocar article speaking of the Veyron;

"when the crankshaft of this car’s 8.0-litre W16 engine is rotating at 6400rpm in seventh gear, it will quaff its way through a 100-litre tank of fuel in just under eight minutes"
Click to expand...

:eek: :lol:
 
I do hope they add fuel consumption because I think it adds A LOT realism.

And I guess it's pretty standard by now for sims, isn't it?
And it should be pretty easy to add some parameters in the programm code that are based on weather conditions that change your cars consumption. In addition, light and so on are probably comsunimg some power aswell, should be easy to programm too. They already got the engines power changing the fuel consumption, and light etc. would be just one more parameter to add.

Of course it's not THAT simple, but pretty much, given the development time.
 
When Top Gear tested the Ford GT around their test track, they got 4mpg.

It's a fact of life that cars on a track drink fuel as they're at high revs and wide open throttle all the time.
 
daan
It's a fact of life that cars on a track drink fuel as they're at high revs and wide open throttle all the time.
Click to expand...
I agree with you. Driving agressively, whilst hitting the rev limit will heavily consume fuel, compared to road driving.

For a top speed run with a Bugatti Veyron, it will empty the tank in 15 minutes. I wonder how GT5 will simulate this...
 
Polyphony would have just used a simple formula to calculate a rough consumption...

i.e.

Power / Weight = fuel economy

Maybe factor in Age and Engine Type.


That's how it should stay, it's simple and accurate enough for a game.

Maybe up the accuracy if there's a specific Fuel-economy challenge.
 
That would be a completely wrong formula, sorry.
Fuel consumption depends mainly on how much power is used at a given moment, and for how long. External or internal factors (such as mileage, rpm, load, engine type, age, fuel type, atmospheric conditions, etc) can affect it in several ways.

Weight would be an indirect factor as the higher it is, the more the engine would be used at a high power output/load, resulting in increased consumption.
 

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