Talk:Lotus 3-Eleven Championship/@comment-28169398-20190730193114

Based on the pre-release PR of 73.8 and the Upgrade PR Gains from RR3 Wiki:Upgrades Section LOTUS the cheapest upgrade tree for LTS completion is:

6333343 - PR73.8 - 277

However, for 12 more you can upgrade for 100% series completion of Open Sky Challenge II:

6433333 - PR74.0 - 289

Please Note: These are tentative and need to be verified in game

Given that 100% completion tier for Open Sky Challenge II pays 26, it pays to use the upgrade tree for 100% completion of that series to win the car in the LTS than go with the slightly cheaper option for LTS completion.