Is it a good idea to move from Synthetic oil to normal oil ?

[2bz]

When the engine is up to temperature in Adak, Alaska or Phoenix, Arizona the oil is 250F.

[tmontague]

Originally Posted by 2bz

When the engine is up to temperature in Adak, Alaska or Phoenix, Arizona the oil is 250F.

I can tell you based off of my aem gauges (oil temp and pressure as well as coolant gauge) that this is not the case.

Middle of summer around here oil sits around 220F, in the spring when temps are not as extreme, the oil sits at 210F and during the middle of winter it sits around 180F. These temps are all while.driving on the highway for longer than 30 mins not in traffic, needless to say the engine is well up to temps