[Donnchadh MacGarry]

normally with these settings (Fuel consumption:200%, Tyre wear:170%) everybody does like pitstop somewhere in the middle of the race.
Some go a few laps longer - some pit a bit earlier ... but fuel penalty is just to high and tier change takes so long to do that you rarely start with full tank.
hope that helps

Is that not the settings for the AC GT3 events? The ACC ones are 100% fuel and tyre wear, which is the game and race series the question was focused on. I have done the last two events for the ACC Euro series (same rules as the America and Asia series). I didn't do any testing regarding strategy due to time, but I figured since I don't have to change tyres, then the best strategy was to start with fuel to last the race and just add 1L in the pitstop so as to have as fast a pitstop as possible. This means I can pretty much pit at any stage in the race, as I think there is no enforced pit window timer since I have never seen it (a good time is when I am stuck behind someone but can't make an overtake, or if a car is coming up behind me that is lapping me so I can easily avoid the awkward situation with minimal time loss). However this is a question for the fasted or more knowledgeable and experienced  people that, like Andrea, I would also like to give some insight on.