Duc
The amount of parts you need to repair the cars rely on the circuit.Example:
You will need more parts to repair your cars after Italy GP than the parts needed to repair cars after the Singapore GP(If your reliability stays the same between 2 race).And every 20 engines are given after every 20 races.If you are racing in a 1-car league then Its alright(even spare 1 engine) but if you race in a 2-car league then think wisely to balance the 2 cars or just go on full savage mode and doing a Red Bull to Verstappen giving your driver a car that can only run with 1 engine for the whole season and replacing the other car an engine after every 1 racde(your choice).And Yes,every new season your cars will be reset to a newly-built car.Meaning you don't have to use any parts or engine after the final race of the season
Okay but let me bring a practical example, let's say my car needs 2 parts every race, I have 2 cars so it's 4 parts per race (suppose this constant). It means that after 10 races I will need 40 parts in total. So this also mean that my facilities must make 4 parts per race or eventually I will need to buy them with tokens, right?
My facilities now make 1 part per race, and I lose 4... so that doesn't sound good.
Basically, can I have enough parts from facilities or do I need to buy them with tokens eventually?
Lastly, do I get 50 new parts at the beginning of the new season?