Oil subject will nevery die. Early on in this foum I argued that non synthetic will cool just as well and met strong resistance. I still believe that , but the coupons for oil at 59 cents /qt disappeared so now I just put 5W-30 synthetic in my Intek out of ease of access (use it in my Nissan). It uses a little but otherwise happy. I always check level before starting and , of course, monitor the oil pressure gauge (50 psi startup, 35-40 hot run) and oil temp gauge. It has been documented that thin oil cools better. (OK I am now running from the mob sure to chase me):smile: