Talk:Arash AF10/@comment-2003:86:6B13:9574:BCCB:C3BC:DF64:3552-20171123055722/@comment-27736210-20171123083850

Yes, you can.

If you have 1 million credits on you, you could upgrade top speed to level 4.

After the first test, the upgrades are unlocked up to level 1.

If you upgrade level 1, it still shows level 2. You should be able to upgrade the car to level 4, I think (unless it blocks you off after the 2nd upgrade).

However, if you upgrade level 1 and then leave the upgrades screen, the next upgrade will be blocked off once you return. So you must upgrade all of them in one sitting.

If you succeed, the free upgrade should not be applicable until the 4th or 5th tests, which unlock all of the upgrades.