Good news! Glad my strategy worked for you, silver is great I think these tests carry over to the final game so you shouldn’t have to do these over again, although I’ll be gobsmacked if my game save is there at all online such is the number of isssues I’ve had with not bring able to connect to the network (message saying it’s my internet connection, yet I’m online and on PSN, lol) Time will tell,FINALLY completed 6-8! I set fuel mix to 6, and medium tires. Ran 11 laps, then pit (med tires and full tank), then another 11 laps (medium tires and full tank), then set to fuel to 4 for the first lap, then down to 3, and finally at 1 for the final lap. I finished 4th amazingly. Best place I had the entire race was 3rd, then I was promptly run off the road 10 seconds later.
I'm NOT looking forward to doing this again in the full version