Quote:
Originally Posted by rice_classic
For you I would recommend the mobil 1 0w-40. It's a thin 40 and it's the european formula which is vastly superior than any USA Mobil 1 offering. Secondly, if you're seeing 280F oil temps at the track, you don't necessarily need to change your oil immediately but you DO need to run a 40 Cem because these cars do NOT like making oil pressure when the oil is very hot. That is extremely well documented on this very forum.
I run 0w-30 in my DD only FRS period. If I were doing double duty then the first thing I would switch to is a 0w-40.
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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
