The viper is a fine choice but it seems to be more related to technique than car. There is a wide variety of vehicles being used with success in the race.
Other drivers are getting better mileage then me. And the car they are using? Same as me.
I watched a Huracan driver, unwisely, use 70% of his fuel on the first lap and not pit! He managed to get to the end with a 9:17 lap on 30% fuel liberally using 7th gear. Unwise but freaking amazing at the same time.
This is a true fuel saving race and it is hard. There is not one rule to follow but you need to blend multiple techniques as the situation arises:
- Get in the slip of another. This is huge. All of the other techniques require a sacrifice but this one is mostly free so long as you have picked someone who is fast enough.
- Short shift and use a higher gear.
- Lower the fuel map.
- Lift and coast into turns.
- Brake later and aggressively to minimize the braking zone. And yet, it is critical to keep high corner speeds and that is so hard when your approach speed is so much lower. You need to relearn and drive by "the seat of your pants".
- Map your fuel % in advance. That is, run a race and determine what the optimum fuel % is for a handful of key points. Then adjust your aggression based on that load. I don't support leaving extra to the end so you can race the last bit. It means sacrificing earlier opportunities.
Decide where you are going to spend your fuel:
- Don't sacrifice corner exits as you need to build up speed.
- Go hard to catch up to the next racer so you can get into that freebie slip. Spend now to save later.
- The straights are critical... I think you need to spend some of your fuel here but ease off as you near the end of the straight. I am undecided on Dottinger. Enter hard but at some point I think it is wise to ease up and sacrifice 20 kph of top speed. I don't know the right approach to this.
EDIT: I am not an expert. This is my first serious fuel saving race. Your mileage may vary