Originally Posted By: steve20
I have said this before, but IMO it is worth saying again. I've had several Corvettes equipped with digital oil pressure & digital oil temperature readings. While driving slowly--for an aluminum block & head motor the oil temp is roughly half of the coolant temp, up until the coolant temp reaches 150 degrees. After 150 degrees, the oil temp starts to catch up to the coolant temp to the degree that oil temp is at approximately 75% of coolant temp when coolant temp = 195-200 degrees.
In summary, when the thermostat opens (190-200 degrees) the oil temp is just coming up to 150 degrees.
These observations hold true from 10 degrees to 100 degrees outside temp: the variable, is how long it takes
Steve
That's interesting, as I have a 2011 and my experience is significantly different, and the experience of other local owners mirrors mines.
The coolant temperature has never taken more than a couple of miles to go from ambient up to about 180-190 degrees F. We've recently had sub-freezing temperatures and from a garage-indicated coolant temperature of about 48-50 degrees, it rises to within triple digits during the quarter mile drive out of our neighborhood at 25 MPH speeds. By the time I get to the freeway onramp, about a mile and a half away, the coolant is at least 170-180 degrees F.
The oil temperature, however, is probably only about 10 degrees F. warmer at that point. Prior to installing an external oil cooler, it would take between 10-15 miles of freeway driving or 10-15 minutes of stop and go driving to reach 150 degrees F., which is the minimum temperature I use before going full throttle or running it to redline. The coolant temperature has pretty much stabilized between 190-210 degrees F. within about three minutes.
Again, this is a 2011 with LS3, and my experience mirrors those of many other local C6 owners since it's often a subject of discussion especially as many of us have equipped our cars with external coolers for extended track running, and that exacerbates the oil temperature problem. Without a temperature bypass valve, on very cold days my oil temperature will seemingly never get to 150 degrees F. by just driving on the freeway.