BUG - Fuel not lasting at all Roco 001

So I was doing my regular Roco 001 races, and decided to try Donington Park in heavy rain and then Tarumã haze weather.

Race was 9 laps. I set the fuel for 12, just in case. Did Practice (10 minutes), after 5 laps I ran out of fuel....

During the race, my fuel (which was estimated at 12 laps) started to go down very, very fast. So I switched to another fuel map, all the way to lean, and on lap 8, I ran out of fuel. When I saw the AI, they were all pitting at lap 8.

Either the fuel estimate is WAY off, or the car (my car and the AI) is burning A LOT more fuel then it was supposed to.

Please check into this.