Forscan Hi, I learned about Forscan on this forum. if you search, there are a couple of threads that will walk you through the entire process. I purchased an USB OBD interface from amazon for $30 bucks and ran the Forscan PC software on my PC. Forscan thread http://www.fordraptorforum.com/f260/forscan-changes-tweak-your-truck-52149/ USB Device https://www.amazon.com/gp/product/B01F0GVBWY/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 Bluetooth Device https://www.amazon.com/gp/product/B006NZTZLQ/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 ---------- Post added at 12:25 PM ---------- Previous post was at 12:21 PM ---------- I used about three liters (three bottles), but with this being my first application of the product, I wasted a fair amount on test surfaces like plywood and cardboard. I also applied three heavy coats, so two liters certainly could be adequate.