Whats an Acceptable Engine Oil Temperature (EOT)
I did the head gaskets on my truck back in Dec of 2011. I didn't replace the oil cooler at that time. The truck has runs good since I did the head gaskets. Back in Jan, I got a scan guage for this truck. I did a trip to NY with this truck and noticed the EOT was running about 225-230 degrees. So last month I picked up a new oil cooler on craigslist on the way back from NY. I did a coolant system flush last month before changing the oil cooler. Around Feb 15th I changed out the oil cooler. After I changed out the oil cooler I noticed the EOT were ranging from 193-196. Last week I made a trip to Lubbuck and somewhere around Breckenridge the wrench light came on and showed Oil cooler efficiency monitor - DTC P012F code. The EOT was at 203 degrees and the ECT was showing 192 degrees. Never before has this wrench light come on. I noticed it was a little low on coolant, but couldn't find any leaks. I was running the truck about 75 MPH. I topped off the coolant and the coolant level hasn't changed since I topped it off. Normally running the truck around town I getting 196 degrees on the EOT and the ECT ranges from 183-192 depending on how I'm driving the truck. The truck has a new thermostat also. Are these Engine Oil Temperatures acceptable? I guess the answer to this question varies alot depending on who you talk too.