Suggested

Engine storage

Improving the production center also increases the space to store spare parts ... why not make this possible to store more engines?
Also choosing to save engines can be a strategy, saving them when you choose to still use old ones, and use new engines in the most delicate moments of the championship fight.
That only 20 engines are supplied every 20 days is correct, but if after 20 days I have kept extra extra engines, it is not right that the engine deposit only returns to 20  :/

Thanks

Of course I know the rules, I am in fact asking to be able to change this rule.

Obviously I do not ask to be able to have as many engines as the spare parts (hundreds), but to be able to at least store 30 or 40 engines maximum, number that will grow with the development of the structure.

I think it can be a possible thing.
With current rules, they always lose engines.

The rule itself is out of wack.... 
10 engines for every 20 races..... 
I use coins to buy engines so that I can race the entire season. 
How else would any one be able to do it otherwise? An don't say run used engines.... which by the way I do when I "have" to.

One should be able to at the very least be able store enough engines to last the entire season. 

I like the idea Black Dragon.

Sounds like a cash cow! LMFAO!!!