I'm a bit dissapointed with this oil " Torco 5/30 " that I'm using for the first time. This AM at sub 15f the motor noise was just not acceptable for me during fire up . It was the pistons not the lifters . " Miata engines use spray bars to lube the wrist pin and cool the pistons "
I started noticing more noise than usual when the morning temps got around 30f over the Mobil 10/30 SS I used in the past but was amazed at the difference another 15-20f lower ambient temp made .
Other than this the oil seemed to do quite well at higher temps other than fuel mileage was down a bit .
I think it's probably a good oil especially for warmer climates and their advertising suggests it's a narrow focus performance oil which I knew I might be in for trouble when cold weather hit. I just could not imagine what noise I might have heard if the 10/30 Torco with even less cold weather capabiltities had been in the Miata engine this AM .
Later today I'll drain it and try again when summer rolls around .
Just my observations based on previous oils I've used in this motor .
[ January 06, 2004, 09:16 AM: Message edited by: Motorbike ]