I think this scanguage tool provides that data, just check
Oil Temp in Stop and Go Traffic
- Thread starter The Critic
- Start date
most likely in lab testing they get a one percent gain on fuel economy with those ultra low viscosity motor oils... which goes out the window when a person factors in all the variables end users do when driving there car. like sitting in the drive thru at or stuck in traffic..
Like I told my mother in law when she was whining about how much gas she goes thru, do you know how many mile per gallon you get when you sit in a drive thru? answer is Zero.
The rams seem to run hotter by design.
My 6.4 towing this week.
And at highway speeds today, not towing. I'm seeing 210-215. So I imagine stop and go would be higher.
On my stock RAMs engine, I would see up to 235 going up a grade at 70 with it being 110 out. Normally it would sit around 215.
After I cammed it and installed the hellcat pump, I would sit around 226-228 and it would go up to 240.
Hottest I ever saw was 250 ish when my thermostat failed.
Anything below 260 you really don’t have to worry about, 226 is more than acceptable and normal.
After I cammed it and installed the hellcat pump, I would sit around 226-228 and it would go up to 240.
Hottest I ever saw was 250 ish when my thermostat failed.
Anything below 260 you really don’t have to worry about, 226 is more than acceptable and normal.
That's just it. Or else when you factor in the climate where the vehicle is based. What's going to flow better, and offer better mileage because of it.most likely in lab testing they get a one percent gain on fuel economy with those ultra low viscosity motor oils... which goes out the window when a person factors in all the variables end users do when driving there car. like sitting in the drive thru at or stuck in traffic..
Like I told my mother in law when she was whining about how much gas she goes thru, do you know how many mile per gallon you get when you sit in a drive thru? answer is Zero.
A car with a crankcase full of 0W-16, sitting in a driveway in Fairbanks in January. Or that same vehicle filled with 0W-40 parked in Palm Springs in June?
CAFE is for guys in white lab coats with clipboards. It means absolutely nothing in real world driving. Or real wallet savings.
4WD
$50 site donor 2025
Rubicon: was 218° on highway and 229° in sand …
Drilled the plastic vents …
Took 3-5° off …
Drilled the plastic vents …
Took 3-5° off …
On my C8 Corvette, water temp usually runs 175 to 185, and the oil temp runs about 10 degrees cooler. This is out on the open road at speeds 50-75 mph. Its a dry sump oiling system, so I don't know where that oil temp is being measured, in the engine someplace or in the oil tank.
I think the main reason for the oil cooler on a 21st century engine design is survivability of these hi stress turbocharged engine that have became commonplace. the stuff you mentioned falls right in line with the that. .
I think everybody acknowledges CAFE comes into play, so proper temp control is part of that.
Man I wish all cars gave you this info.
edyvw
$50 site donor 2025
There are two types of oil coolers: brick style fluid heat exchanger and radiators type.
Brick style is the one that is now extremely popular bcs. it has a lot of advantages:
1. Coolant will reach operating temperature much faster. It pushes oil temperature up faster. It is good for mpg, longevity of the engine.
2. It can maintain oil temperature at higher loads in acceptable range.
3. Radiator is more heavy duty and has to be executed appropriately meaning manufacturer should install thermostat. Some don’t!
BMW now utilizes both heat exchanger AND radiator or two radiators. It is really not turbo issue. If you can maintain temperature with heat exchanger, you really don’t need radiator. The question is: what is purpose of the vehicle? In BMW’s case they don’t want to repeat bad press of E90 335 overheating on tracks in 2007. They went all hardcore with cooling system after 2012. Same goes for towing.
There is no downside to having some kind of oil cooler. The question is: is manufacturer willing to invest in it.
I'm curious if you know where the oil temp is measured?
I assume it's not a sump temp.
I understand BMW does what BMW does.. it's more about image and the expectancy that a Perfect German Driving Machine is Perfect... they don't care if no one can fix it,.. . what I am referring to is the more proletarian working peoples vehicles now, most are turbo and most have an oil cooler..
whereas in a previous time period those same proletarian working people's vehicle didn't have an oil cooler, or if they did it was because they were setup for towing or police or taxi duty..
OTOH I cannot think of a diesel engine I have ever worked on (except a 1 cylinder Yanmar)that didn't have an oil cooler.
long before the turbocharger was a thing, those engines had oil coolers..and some of them had thermostats in the oil cooler 40 years ago...
so I think the answer why is several reasons...
OVERKILL
$100 Site Donor 2021
It's on the oil cooler housing, IIRC.
edyvw
$50 site donor 2025
Oil cooler is very simple thing. There is nothing special about it. Manufacturers won’t put it if they can get away with it or they just want to deliver basic product. I have heat exchanger on Tiguan and Atlas. VW delivers it without expectation to track or race car.
edyvw
$50 site donor 2025
M2/3? Right? Yeah, their cooling system can maintain temperature in 18-wheeler.
Just posting this for comparisons; My 2002 Jaguar XKR will display the oil temp on any OBD-II display. It normally is 16-20 F above the coolant temp. Mostly the oil temp is in the 205-230 F range, but it will get higher in stop and go traffic in the summertime (100-122 F in NE Oklahoma). I’ve seen the oil temp at 240 F more than a few times driving thru backed up Texas traffic.
The car does have a factory installed oil cooler with an oil diverter valve (Jaguar terminology).
This valve is fitted between the oil pump outlet and the oil filter inlet.
The oil diverter valve operates thermostatically and at higher temperatures diverts the oil through the oil cooler.
It begins to opens at 217-226 F and is fully open at 246
Z
Yeah M2C (S55)
that there is a perfect example of an hyperbole, if there ever was one.
edyvw
$50 site donor 2025
Really? Tell me why? If you are accusing someone of it, explain why. I have no doubt your detail knowledge of these systems will help you.that there is a perfect example of an hyperbole, if there ever was one.
Similar threads
