Quote:
Originally Posted by glamcem
That was the oil I was using last year with the same thing in mind Colin,
then I noticed that I was obviously missing an important point:
why do we want to see more oil pressure ? because it's a good indicator of how stable is the oil flow (fluidity) in the engine , well in theory yes but thinner oils do that naturally.. they're thinner so they flow better, get into the veins of the engine which ultimately balance the temps since it is the primary reason for the low temps ... so thicker doesn't necessarily mean more protective, well to some point yes .. if you think about it what would be the best oil if you keep your oil temps below 280 F, obviously the thinnest oil that you can get away with it..I've also heard many stories with people using 40 - 50 grade oil, racing teams use 15w-50 or 5w-50 oils but for race engines and special race oils AFAIK..
both me and my friends experienced the same thing when we switched back to 5w-30; the added friction was also responsible for the higher oil temps at track days... my friend's Miata is also boosted (KW kit) and he has full bolt on Camaro, similar results on all three cars .. it certainly has to do something with the tighter tolerances of the newer engines .. it might be different for your CRX though or any older engine perhaps.. my main concern now is the coolant temps so I will see how the Cosworth low temp thermostat work, I will also try to utilize that to operate the hybrid oil cooler I have in mind..
if you never tried extended Performance version, you might also want to take a look at it it's 5w-30 but on the higher side of the viscosity index, and pretty close to 0w-40 ..
for me, I'll just stick to what I have and address coolant temp and overheat issues at the core and continue changing my oil more often  |
Just as an FYI, we were running 290F at the track with no oil cooler running Motul 8100 0w20 or 5w30. Our coolant temps however didn't go above 205 when we had the stock rad. Once we moved to the Koyo Rad the temps don't go over 196 on track and now with our Perrin Oil Coolers we don't see more than 238 on track for oil temps.
If you are seeing high coolant temps on track, even with stock radiator, you may have another issue going on with your car.
-mike