I discovered that managers with engine type specialty(electric -30%,diesel -30%,steam -15%) doesnt just lower the purchase price but engine maintenance cost as well(by the same amount). ;) At first i thought that maintenance is somehow related to engine price but it isnt so. 8) Ive tested other managers with engine price reduction ability but didnt see any changes in maintenance cost. :) Does anyone know of any other secret abilities??? P.S. Managers speed increase also increases fuel consumption by the same amount.