I just sent a post to 80scool about AU oil.
kurt
kurt
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I get Oil Pressure whilst on the Starter Motor and the Engine starts first time every time. :
If you have ever had the pressure exceed 15psi on the Radiator Cap, You will know that the temperature is about 115 Celcius and at about this temperature Synthetic Oil Separtes.
Cary:
Right on. And as I noted before, it makes me kinda wonder why Toyota (USA) specifies 10W-30 for higher temps than 5W-30; the cold-relevant (5 vs 10) end of the scale seems irrelevant to the hot end of the scale where 30=30. BigMac