"Rob
Why are you listening to your Tech Director at level 5?
What you want to do is to look at the previous season races. Home / race result / above right is how you change the season / tier and track.
Click on your drivers under the race and there is all the data you need for you actual fule ammounts... If you are a F2P player, then you probably don't set it to fully pushing, so add 0.1 to 0.2 per lap.. depending what you had set previous.
I hope that helps.
where can I find last seasons results? and i can see the fuel usage per lap in the extra info per driver in the extra race info right?