Talk:Cars (Fully Upgraded)/@comment-117.207.199.7-20141103051950/@comment-80.168.156.2-20141103114356

...and using an exhausted car in a time trial increases your % completion for a series however slow you go, so long as you do a valid lap.

Service times get longer on higher spec. cars so you'll do a lot of waiting unless you go for the 3rd mechanic.