I can see how its thinner at startup then say, a 10W-30; however, once the Mobil 1 5W-30 reaches operating temp. it has the same viscosity as any other oil with a viscosity of 30, right? Would I be better off going with the 10W-30 Mobil 1 in non winter months? Would my wear be improved with Mobil 1 10W-30? Thank you for your help!!!