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LMAO for hanging the speedo at 80 mph your oil temps aren't really that far out of line.
The boiling temp of water increases 3 deg for every one PSI, + or -.
However it takes a lot of BTUs to go from the boiling point so where the water flashes off into vapor: It takes about 180 BTUs for 1 pound of water to go from 32 deg to 212 deg. I say about because a BTU is defined as the heat needed to raise the temp of one lb. of water 1 deg from 60 to 61 deg, in one hour. It may take a tiny bit more or less at a lower or higher temp. this is called sensible heat ( cause you can sense it)
In order to boil that same lb. of water from 212 water to 212 steam another 970 BTUs are required. This is called the Latent heat of evaporation. Latent cause you cannot sense it as the temp does not change just the state.
Yawn.......
So if your running somewhere north of 215 oil temp you can be sure any moisture is gone.
Note: the amount of water, if any, in the oil is not enough ( Or should never be) to have any noticeable cooling effect on the oil as it evaporates.
My oil temp rarely goes above 200, I change the oil at 6k. I am not concerned with any condensation In my oil. If I had an older engine than I would be as older engines were more open to the atmosphere.
Yeah a bit bored at work today
I've seen my oil temp get up to 261. When towing my camper, it's usually between 235-250. I'd like to lower it a little bit, but no issues so far. I'm running Pennzoil platinum 5w20.
Did you find that the plug used on the v6 upgrade wasnt long enough?View attachment 117315 View attachment 117316 View attachment 117316 Mine used to run that high as well....until I changed our thermostat to a 180. Now truck runs 185 on the button. I also got rid of the clutch fan and installed the v6 efan. Nice upgrade. Unless you are towing and working the snot out of truck this is a gr8 mod.
Mine fit perfectly...but some 14 owners had to extend it to reachDid you find that the plug used on the v6 upgrade wasnt long enough?
I've seen my oil temp get up to 261. When towing my camper, it's usually between 235-250. I'd like to lower it a little bit, but no issues so far. I'm running Pennzoil platinum 5w20.
I hit the same temp going up the same kind of grade with 5w30 redline, so I'm thinking that's normal with these engines going up that steep of a grade. I was towing a 7000 pound trailer though in the summer in AZ....I've hit 275ish with mine going up a 7% grade from 1500 to 8300 feet. I use the same oil as you.
My conclusion is that, these engines are engineered to reach an engine oil temp 260 degrees and hold there, depending on the engine load requirements. At no point did the power derate, or the speed drop off, or any warning lights appear. I thought it was interesting, though, that the analog temp gauge didn't move at all throughout any of these trips. It stayed just left of center the entire time.
The lore from somebody purporting to have divine knowledge from inside Subaru was that gauges on modern vehicles are programmed to sit in one place as long as the thing they're measuring is within an acceptable range. The purpose of this is to stop hypochondriac owners from using up dealer shop time whenever the needle doesn't quite sit in the same spot they're used to seeing. I could see this as being true across all brands, for better or worse.
go amsoil mine ran cooler and a 195 t start got a 180 for summer to put on soon ! I use my turner to run ac fan all the time for sumer so now 200 on a 103 day here but usually runs 195 so nice runningI occasionally tow a 9500 lb. tractor and trailer for 125+ miles, some flat, some hilly terrain. According to my log the highest the oil temp has gotten was 239 F and I'm running the same oil and weight as you do. Looking at the Pennzoil spec sheet the blend is good for better than 280+, as most synthetics are.
Best regards,
Dusty