I did some testing for an up coming WRS-Online Special Event (
Toyota YellowHat YMS Supra '05 @ Twin Ring Motegi - Road Course with Racing Medium Tires) and the new fuel consumption / tire wear settings appear to fall out like this:
Normal =
1x (~2.8 L / Lap)
Fast =
2x (~5.6 L / Lap)
Very Fast =
4x (~10.8 L / Lap)
Those are fairly accurate calculations for fuel consumption. The tire wear (more subjective, subject to driver error/variance) seemed to follow suit with those rate multipliers very closely.
The "Normal" setting appears, for this combo at least, to be about equal to the situation just prior to 2.09. The "Fast" setting reminds me of the tire wear from earlier in 2012. "Very Fast" is probably only meant for short 15-20 minute races as the car was burning 10+ L of fuel per lap and by the time the tires got up to an optimal temperature there was already some noticeable wear.
Results may vary with other tire compounds.