Thread:Profoundly Quiet/@comment-26161022-20161002070927/@comment-27524282-20161002125922

The S9 MBSL is indeed inefficient for more expensive cars but is still decent as an economical way of grinding credits since its relatively cheap by 2016 A8 standards.

The main thing to look for are S9 tracks on San Diego, Alps or Dubai since those are the shortest. The rest of the tracks aren't short enough to be as effiecient.If you have the Agera R, CTR 3 or Veneno at Max Pro, their Mastery race #15 are a step up from the MBSL.

Have a look at this page and its sources for more info.