Quote:
Originally Posted by bur****jp
|
Pertinent!?!
I think so. It illustrates exactly what the data in this thread suggests and also makes what I've been saying all that more logical! (well, to me at least)
So that manual recommends a 60wt oil vs the 20wt that's stock. That's a huge eye opener for anyone tracking their car and a huge jump in viscosity. It suggests that pressure is very important as the difference of system pressure between a 20wt and a 60wt will be very noticeable. Just look at Dezoris's data when he went from 20wt to a 40wt at a static temp (185F). He realized a 26psi difference at 7000rpms between the 2 oils. Bump that viscosity by another 20wt and voila.
So why does this make what I say logical? The answer is delta. (no not
that Delta).
It provides us more data on what types of pressures are needed for proper protection of these engines in track conditions. So if I track my car I need the pressure increase from a super thick oil but when I'm done tracking my car should I really be driving to and from the grocery store on a 10w-60? I don't want to, but I
also don't want to change my oil before and after each track day.
The solution brings me back to the shim in the PRV which
should give enough of a bump in pressure such that one would be able run a 0w-30 around town
and at the track without needing to constantly swap out various types of oil.
Edit: that GT86 manual also shows an oil cooler and the 10w-60 pressure increase most likely also accounts for the oil cooler pressure drop as well.