Here we collected some mileage correction test feedback from DK forum
OBDSTAR X300M user1.range rover sport 2013 (full lcd) - obd ok
2.Ford Kuga 2009 Red big display.Read ok.Write ok.2 min and job done........ 3.Craysler Vojager 2003.Read okWrite ok1 min and job done........4.Today Ford C-max bj 2015 in 5 sec with
OBDSTAR X300M5.Peugeot 508BSI Q0x-00BSI and dash by OBDAll ok.6.Peugeot 508 2010 1.6 dieselBSI read flash and eeprom about 5-8 minDash 1-2 min7.citroen berlingo 2009 bsi jonson bsi04ev k01work km in obd all ok,instrument cluster mareli i work with nyo42017 by luisall ok8.Today I have a Seat Leon (MQB) in the 30 seconds ... with obdstar X300mAnd tody i have a Ford Fiesta bj 2011 in the 30 seconde.... More OBDSTAR X300M Test report at here:
http://www.mileageprogrammer.com/obdstar-x300m-mileage-correction-feedback/