This makes sense to me Norm, Well said. Now I wonder if a heavier viscosity has an equal ability, better or worse to remove heat?
Differences in additive content aside, I'd have to assume that the heat removal ability of a heavier viscosity index would at least equal that of the lower VI oil . . . as long as the temperatures were such that the absolute viscosities were matched up.
You're definitely welcome to that opinion. But id like to ask what i have to gain from omissions? Ive simply been a master tech for over 3 decades at a few brand (ford being one of them) dealerships. Im an extreme car enthusiast by passion as well, ive also had 6 mustangs (among other brand chassis)im not new to these things. Infact (if it matters which i doubt) one of every chassis since the foxbody with the exception of 2 foxbodies. I have zero benefits from misleading anyone nor do i have invested stock in any oil companies. Im 100% honest on what i post here. If i dont know ill say so, im not afraid to share that. I typically try to never share any misinformation because i hate that. I try not to post on things i dont know anything about. If i do post and i am unsure i sure wouldnt try to tout myself like i am. I am on occasion misinformed but i pride myself and work very hard not to be. Take from that what you will...or wont. :ford:
Yea I run rotella t6, 5w40. pretty awesome oil for the price. i change it every two competitions or 5000 miles which ever comes first
Correct. Thinner oil transfers heat quicker than thicker oil. If a cars oil cooling is designed properly for track use, a thinner oil can be used and cool more efficiently than thicker oil, but as you said, thicker oil is needed when oil temps go beyond normal operating temperatures and thins out.
The 5w20 in the US has a lot to do with fuel mileage and CAFE standards.
The s550 coyote is almost exactly a roadrunner engine. Bigger intake cam than the roadrunner, roadrunner exhaust cam, heads cast for larger valves so they weren't cnc, roadrunner springs/retainers etc. Different timing chain and balancer though and no boss manifold. Same rods and bearings but not forged pistons.
Right - so, part of the story, but not all. What I don't know is the oil journaling on these 15+ motors, ands that's a key factor. Could I recommend the same oil I run in the Boss? I don't know. But I place more faith in true synth race oil blends and additives than I do in pure weight. After all, if the oil can't flow as designed, not much else really matters, does it?
I can agree with you. I almost forgot we use a boss crank. From what ive heard from big builders ive discussed my own build with this uses the same tolerance in bearings and journaling as the roadrunner
Good deal - if you are working with builders who can speak to that, you know more than I do about the 15+ Coyotes. If the journaling matches, then there is no good reason not to run 50 weight on the track with these cars.
