It about the strength of your driver, if you set it to 50% when your driver's strength reaches 50% he will then automaticaly pit.
Set it to ''off'' and he will only automatically pit when either tyres or fuel is required (not sure if it's either or both though)..
Its either. run the Indy 500 with the X2010 with any set of tires and you'll notice that the car will usually run out of fuel by 27-28 laps and the tires are fine, yet every stop you can't choose to just fuel up, you must do both.It about the strength of your driver, if you set it to 50% when your driver's strength reaches 50% he will then automaticaly pit.
Set it to ''off'' and he will only automatically pit when either tyres or fuel is required (not sure if it's either or both though)..
So far the only place I see a benifit to turning this on is Nurburgring endurance races. I find that if it is off Bob will always try to squeeze one more lap on his tires than he should and loose a great deal of time in the process. If I set this to 30 on that race he will pit 1 lap sooner and keep good tires the entire race which makes him a great deal faster overall. Other than this I can not see a need to use it anywhere else.
Bobs 'strengths' seem to run out some time after 2 hours. My one single Bob (not used another yet) races fine, with fast laps, with no strength at all. His longest race so far is the Tsukuba 9hr so I cannot comment on 24 hour races, but I believe people have confirmed elsewhere here that a single Bob can do a 24 hour race.In most cases, it is not necessary to use, unless you are on a track where the driver's strength outlasts the car's stint on tires or fuel and a lap on worn tires means disaster (Nurburgring 24 H variant or similar to that).