11/20/2009 Volvo FM12 420 tuning + consumption optimizationSoftware tuning on a Volvo FM12 420 and that with a fuel savings up to 3 liters. The software modification was tested on own truck dynamometer at allcartuning. Optimum performance:480HP / 2300NM (Dynosheet) EUR 1.199,- incl.VATBack