After reading about the new Group III M1 15W-50 (the older M1 15-50 worked very well for me), I want to switch to an oil that I know is going to provide similar levels of protection.
The issue is this, connecting rod bearings on these high output, high RPM turbo miata 1.8L engines tend to have short lives in some peoples engines. Also there is the turbo coking issue. Add to that, the hydraulic tappet issue, which favors a thick oil or STP type additive. Then there is this issue: the oil pump gears tend to shatter under high output. There is some speculation that thicker oil cushions the oil pump.
I live in South Florida, where it is hot all year long. Plus, I do not use an oil cooler, as they reduce the already marginal oil pressure these engines have.
Ya know, come to think about it, I am not getting as much oil pressure with this new M1 when hot as I did with the old stuff. HMMMM, I wonder???
My main concern is, of course, the connecting rod bearings.
Can 'yall suggest a fairly high viscosity oil that will perform under very high temps and stress? Car runs HOT!
Suggestions please!
Thanks,
Chris
The issue is this, connecting rod bearings on these high output, high RPM turbo miata 1.8L engines tend to have short lives in some peoples engines. Also there is the turbo coking issue. Add to that, the hydraulic tappet issue, which favors a thick oil or STP type additive. Then there is this issue: the oil pump gears tend to shatter under high output. There is some speculation that thicker oil cushions the oil pump.
I live in South Florida, where it is hot all year long. Plus, I do not use an oil cooler, as they reduce the already marginal oil pressure these engines have.
Ya know, come to think about it, I am not getting as much oil pressure with this new M1 when hot as I did with the old stuff. HMMMM, I wonder???
My main concern is, of course, the connecting rod bearings.
Can 'yall suggest a fairly high viscosity oil that will perform under very high temps and stress? Car runs HOT!
Suggestions please!
Thanks,
Chris