Originally Posted By: demarpaint
Originally Posted By: kr_bitog
Originally Posted By: Dave9
There is some error in your methods. It is snake oil and does nothing useful. If anything you want the opposite, for the oil temp to rise to an optimal temperature quickly then your cooling system keeps it in the optimal range.
Actually it is true that using 0w20 let the engine reach operating temperature faster than 0w30 based on my observation, however the reduced friction also let the engine slower on reaching the normal temperature.
Too bad...not many people understand the simple physics
Ambient temperature, run time, and driving conditions being equal, how much faster does 0W20 reach operating temperature vs. 0W30? Thanks.
Sorry there was typo on my post earlier, I compared 0w20 and 5w30.
The dealer is using Shell Helix Ultra Professional 5w30, and I do not like it due to mpg hit and slower engine response, so I change with Mobil 1 EP 0w20 as recommended on owner manual.
The difference on warming up is not that much because my starting ambient temperature is around 30C, it is just about 2-3 minutes driving difference.
The interesting part is after adding Lubegard or Molygen additive, the oil temperature will not hit 99C for much longer time.