Here are testing mileages from Valencia and Jerez for anyone interested:
Ferrari
3,191.6 km / 1,983.2 mi / 748 laps
Red Bull
2,777.9 km / 1,744.8 mi / 652 laps
Force India
2,478.5 km / 1,540.0 mi / 591 laps
Mercedes
2,309.6 km / 1,435.1 mi / 541 laps
Sauber
2,274.0 km / 1,413.0 mi / 534 laps
Toro Rosso
2,260.9 km / 1,404.9 mi / 530 laps
Williams
2,153.6 km / 1,338.3 mi / 511 laps
McLaren
2,149.1 km / 1,335.4 mi / 512 laps
Renault
2,126.9 km / 1,321.5 mi / 502 laps
Virgin
1,825.5 km / 1,134.3 mi / 433 laps
Lotus
1,452.4 km / 902.4 mi / 342 laps
Hispania*
752.9 km / 467.8 mi / 188 laps
TOTAL
25,798.5 km / 16,030.4 mi / 6,094 laps
Taken from:
http://www.gpupdate.net/en/f1-news/2527 ... ts-so-far/