Wow - please report back your findings.2011LT2 said:I changed mine at 1500 miles and put conventional 5W-30 Mobil in it. Within a week I will take a cold and warm oil sample for analysis to see how viscosity holds up and to see if there is reduced or increased fuel in the oil. If fuel dilution remains I will up the viscosity and see what happens, if the fuel in oil decreases I will try synthetic again to compare, then conventional again. If conventional Mobil shows the same pattern of Iron wear as Mobil1 then I will switch to conventionl Valvoline or Penzoil.