Board Thread:Game Discussion/@comment-35997227-20190331000456/@comment-33228676-20190331045547

If you're in dire need of a good farming race, I'd say go for it. But beware, to recoup the gold spent upgrading the car you'll need to drive a lot around PTT, which can become tiresome at some point.

Anyways, the FXX is a cornerstone in RR3 so even if you're a bit low on gold you can't go wrong paying the full price to upgrade it, especially if you take in consideration it had a sale not too long ago.