Cars Need Different Fuel Consumption and Dirty Oil Needs to do more

[power091999]

I doubt that car manufacturers would want to advertise the fact their cars have awful fuel economy, so I doubt PD would get permission from them to implement it.

Of more pressing importance, I think that in light cars such as the FGT, you should notice a drop in laptime as your fuel level drops, as in real life, as the weight of your car decreases.

I wouldn't really care if oil changes weren't part of the game. If they were I would happily wrap up that, the rigidity refresher plan, and a wash in one whole "service", which you would be promted to do after a certain mileage, to restore your car to a totally new condition.

Althought I agree they would not want to devulge this info for a "race".

But it's info they have to provide to consumers Highway/City MPG i mean.

 

[Worst_Driver]

I doubt that car manufacturers would want to advertise the fact their cars have awful fuel economy, so I doubt PD would get permission from them to implement it.

Its not a secret to anyone that a Viper SRT-10 is a gas guzzler, I'm sure that even Chrysler don't deny it. So PD wouldn't get the permission to implement different fuel comsuption. Why ? Everyone knows that a 1970 Chevrolet Chevelle burns way more fuel than a Ford Focus for example. My point is I don't think that car manufacturers would oppose to PD concerning this feature because its normal that some cars consume more than others.

 

[Griffith500]

It seems way to difficult to implement

1) Different fuel consumption for different cars
2) Different fuel consumption when driving different
3) Less fuel by start, so the weight is -

A lot of factors !

Here's how I'd do it:

1) Get fuel economy information from manufacturers and third parties for the majority of modern cars; failing this, ask the owners (whose cars were borrowed for the more obscure models) what their best estimates for fuel economy are (better than nothing) etc. Choose one basis and stick to it for all cars, if possible. This means choosing the basis that best fits the way people measure their own fuel economy.

2) The difficult part. Using the basic mpg figure, the power and / or torque curve(s) for the engine and a standard normalised fuel usage / rpm curve, offset the fuel usage according to the power currently being produced and at the current rpm and also for the current drag level (tyres & aero). Tweak the parameters until a representative benchmark in-game fits a fair number of cars in real-world tests. Extrapolate to all other cars.

3) Petrol has a specific gravity in the range of 0.7 - 0.75, so a 100 litre tank of fuel would contribute 70 - 75 kg in weight, Diesel about 90 - 95 kg. We already have the facility to adjust the vehicle's weight via PP in GT5P and weight reduction in previous GTs, so the facility is already coded.

Easy! As has been said, GT4 had these features already. Once step 2 has been completed, it should be fairly easy to add new cars, as all that would be required are:

• Fuel consumption (standardised basis)
• Power / torque curve (already necessary)
• Fuel tank capacity (and location?)
• Stock tyre sizes and compound (already necessary?)
• Stock drag coefficient (may be tricky to obtain for some cars, I admit)

This is relatively straightforward compared with adding a full complement of parts upgrades for a new car.

 

[audikiller008]

i think the veiron has a higher fuel consumption

 

[Tired Tyres]

Average Fuel consumption figures don't have much if anything to do with real world performance figures. Most petrol cars taken around the Top Gear test track are doing 4 MPG. The lowest rating they got was for a Nissan that did 3.6 MPG. This was in the episode where the BMW 535 Diesel returned 12 MPG and so doesn't cover any of the supercars in the last couple of series.

 

[yeti]

Of more pressing importance, I think that in light cars such as the FGT, you should notice a drop in laptime as your fuel level drops, as in real life, as the weight of your car decreases.

This was in GT4...

Try running an enduro - and after first Pit only fill up with what you need - your car is lighter and will go quicker.

C.

 

[chrisbroughton]

This was in GT4...

Try running an enduro - and after first Pit only fill up with what you need - your car is lighter and will go quicker.

C.

Really? Maybe my driving got progressively worst throughout my stints...

 

[Sniffs]

I've done that testing as well, and did some guesstimates based on the Odometer readings and the assumption the "tank Level" in enduros is 80 liters
a Mercedes Racer with the V12 was apparently averaging 3.5 MPG (US) when running flat out.
an S50 Skyline was averinging 9.5 flat out on the test oval

 

[vaioleto]

I also noticed that there is diff fuel consumption already in GT4, I was doing this 24 hour Nurburgring thing with a Toyota Minolta, and it literally ran out of fuel every 3 laps, but if I slow down then I could get maybe 5 laps out of each fill up...

Mean while, the other cars all filled up a lot less than I did, but they were also much much slower.

 

[niky]

Average Fuel consumption figures don't have much if anything to do with real world performance figures. Most petrol cars taken around the Top Gear test track are doing 4 MPG. The lowest rating they got was for a Nissan that did 3.6 MPG. This was in the episode where the BMW 535 Diesel returned 12 MPG and so doesn't cover any of the supercars in the last couple of series.

This is the problem with using EPA figures. Two different cars might get around 30 mpg on the highway, but going flat-out, they will consume very different amounts of fuel.

As I remember, GT4 already modelled this... except for the aforementioned Prius, which could run forever at full-chat on a single tank of gas, as unrealistic as that may be...

So... who's up for the first online econo-run endurance trials in GT5? Let's see who can last the longest on a single tank...

 

[Ferrari_Tifoso]

http://www.topgear.com/us/videos/more/thirsty-prius/

I agree BTW, but I want to race cars in the same class.

 

[yeti]

Really? Maybe my driving got progressively worst throughout my stints...

Yeah - more noticeable with B-spec.

C.

 

[Worst_Driver]

So... who's up for the first online econo-run endurance trials in GT5? Let's see who can last the longest on a single tank...

I'm up with that but I will probably lose considering my driving style.

 

[Griffith500]

Average Fuel consumption figures don't have much if anything to do with real world performance figures. ...

This is the problem with using EPA figures. Two different cars might get around 30 mpg on the highway, but going flat-out, they will consume very different amounts of fuel.
...

Well, yes, but this is the point of doing the benchmarking. It's all hypothetical, of course. It was just something I pulled out of my arse, no doubt there would be hitches and necessary changes along the way.

The relationship of fuel consumption to the power curve, however, is valid and is probably how PD have implemented it. All that's missing is data on volumetric efficiency across the rev range, as well as, say, injector profiles yadda yadda... you see it gets ridiculously (needlessly, in my opinion) complex quite quickly.

This is why I suggested the standardised MPG figures (urban ideally) as they are readily available, and, combined with the power curve, it'd only take a few fudge-factors to get the thing working against a real-world benchmark.