User blog comment:Na299/Ways of Gold Farming/@comment-182.74.172.245-20150330032731/@comment-24644758-20150330051909

Your understanding of the point F is correct. And you would lose the auto-engineer. But on ther other hand, you can still force close it to retain  auto-engineer. And When you restart RR3, the gold of level up and R$, fame points you've accumulated will be rewarded to you. Thanks, this is really a good point.

To your questions:

1) No, it is not a must. But you'd better to have one so that you can keep doing the races, especially if there is one long race (like 10 lap cup). Otherwise you will probably need to service the car and during the service time, you cannot play other races.

2). I do not fully understand this questions. But the game would prompt the level up at the end of each race. When you stop force-closing it or when you finish one of the multiple races event, you will "truly" level up.

3). Yes, you will.

4). I am on 3.2.1 [H445]. I am using Android.