Maybe I'm the last person playing this game to figure this out but still... I won my first season on the intermediate skill level and I've been cranking the level up in every subsequent season but I've never bothered switching on the "realistic fuel" option before. Today, for the first time, I set the fuel option to on and it all got a bit confusing so I did a bit of experimenting. With fuel OFF, and the skill set to intermediate I found I can easily qualify on pole (in the RBR) on a variety of tracks. If I increase the skill level then the margin for achieving pole decreases as the AI skill increases. All as it should be. If I turn fuel ON there is no difference in quali' performance at all. I still get pol but the margin depends on the skill level. All still good. However, in the race I find myself being absolutely trounced when the fuel option is ON. The skill level doesn't seem to matter. On tracks such as Sepang and Spa (ones with long straights) I can usually fend off the AIs until I reach a straight but then they stampede past me like I'm standing still! As the race progresses I improve my lap times to the point where I'm catching the AIs by a couple of seconds a lap but by then the leaders are 20-odd seconds in front of me. Bearing in mind that (with the fuel option ON) I am qualifying on pole quite comfortably but then being blitzed in the races I can only assume that the AI cars aren't penalised with fuel weight like the player is. Anybody know if this IS the case or am I missing some other reason for this? TBH, none of the other reported bugs in the game have really bothered me but if all the AIs are running with a magical empty fuel tank while the player is carrying an extra 150kg then they REALLY need to sort it out with a patch. I've got to the point where I can win comfortably with all the other options on and the AI set to "legend" but as soon as I switch on the fuel option I simply don't seem to stand a chance, even if I dial back the AI skill to "amateur".