Using the car in my signature, what would you think my oil temp is during sustained 80 mph driving at 2850 rpm? The car holds 6.3 - 6.5 qts of oil.
Oil Temperature?
- Thread starter iunderpressure
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183 degrees
Put a gauge on it...I, for one, would love to know!
My '85 240 (B21FT, turbo, intercooled) had a thermostat in the oil cooler...and always ran 85C-90C...just about perfect...unless I was really hard into the boost, and I could get it up to 100C to 105C...but it would settle back down...
My '85 240 (B21FT, turbo, intercooled) had a thermostat in the oil cooler...and always ran 85C-90C...just about perfect...unless I was really hard into the boost, and I could get it up to 100C to 105C...but it would settle back down...
85-90C would be my guess too.
On a cold day well below freezing maybe 80C or less.
And a 30wt oil at 80C is like a 50wt oil at 100C.
On a cold day well below freezing maybe 80C or less.
And a 30wt oil at 80C is like a 50wt oil at 100C.
90 mph is turning about 3150 rpm. Just extra info.
Originally Posted By: iunderpressure
Using the car in my signature, what would you think my oil temp is during sustained 80 mph driving at 2850 rpm? The car holds 6.3 - 6.5 qts of oil.
What outside air Temp are we talking about? It makes a huge difference.
Using the car in my signature, what would you think my oil temp is during sustained 80 mph driving at 2850 rpm? The car holds 6.3 - 6.5 qts of oil.
What outside air Temp are we talking about? It makes a huge difference.
My best guess: 100-105C. Stock, my '98 R was in that range at extended highway speeds. It's a very similar engine, just a little different exhaust manifold and tuned slightly differently. Obviously though, a temp gauge is the only way to know for sure. I'd keep in mind that oil temps at the turbo are obviously going to be quite a bit higher.
Ambient temps didn't make much of a difference on this car, maybe 2-3C max. What does make a difference is grade; it would climb quite a bit say driving up an extended 4-5% grade.
Ambient temps didn't make much of a difference on this car, maybe 2-3C max. What does make a difference is grade; it would climb quite a bit say driving up an extended 4-5% grade.
Originally Posted By: JOD
My best guess: 100-105C. Stock, my '98 R was in that range at extended highway speeds. It's a very similar engine, just a little different exhaust manifold and tuned slightly differently. Obviously though, a temp gauge is the only way to know for sure. I'd keep in mind that oil temps at the turbo are obviously going to be quite a bit higher.
Ambient temps didn't make much of a difference on this car, maybe 2-3C max. What does make a difference is grade; it would climb quite a bit say driving up an extended 4-5% grade.
I would guess at -30F they would make a lot of difference. I would estimate 130F oil temp with outside temps -30F at highway speed
My best guess: 100-105C. Stock, my '98 R was in that range at extended highway speeds. It's a very similar engine, just a little different exhaust manifold and tuned slightly differently. Obviously though, a temp gauge is the only way to know for sure. I'd keep in mind that oil temps at the turbo are obviously going to be quite a bit higher.
Ambient temps didn't make much of a difference on this car, maybe 2-3C max. What does make a difference is grade; it would climb quite a bit say driving up an extended 4-5% grade.
I would guess at -30F they would make a lot of difference. I would estimate 130F oil temp with outside temps -30F at highway speed
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I honestly think the 90-100C oil temp range (~190-212 degrees F) is common for a lot of hard-working engines. Some cars (Audi, perhaps a BMW) will get it up to ~240F and some cars get it up to over 300F when there is a problem. *highway airflow will make the tempterature a little bit less, unless something was happening in the engine to keep temps high. However, yes, highway airflow would make oil temp lessen. Stop-and-go and ambient heat taxes cooling system, and the cooling system also determines how much heat gets to the oil. The oil can get up into this range, especially on hot days. Its a complex interaction but it is valid.
20 and 30 weight motor oils may be optimal for this but if the engine likes to run hot, a 40 should be considered or even a 50. Its all relative.
20 and 30 weight oil can handle 90 and 100C engine temps just fine. Its the other engine factors that make you need to choose. That said, MOST engines id feel cofortable with a thick 0W-20.. a thin one if i knew my engine.
20 and 30 weight motor oils may be optimal for this but if the engine likes to run hot, a 40 should be considered or even a 50. Its all relative.
20 and 30 weight oil can handle 90 and 100C engine temps just fine. Its the other engine factors that make you need to choose. That said, MOST engines id feel cofortable with a thick 0W-20.. a thin one if i knew my engine.
I use a 40 weight. Depending on how I drive it ranges between 195-215 degrees. I would think your engine would be in a similar ballpark.
Originally Posted By: Bluestream
Originally Posted By: JOD
My best guess: 100-105C. Stock, my '98 R was in that range at extended highway speeds. It's a very similar engine, just a little different exhaust manifold and tuned slightly differently. Obviously though, a temp gauge is the only way to know for sure. I'd keep in mind that oil temps at the turbo are obviously going to be quite a bit higher.
Ambient temps didn't make much of a difference on this car, maybe 2-3C max. What does make a difference is grade; it would climb quite a bit say driving up an extended 4-5% grade.
Maybe with an air cooled engine but a thermostatically controlled motor runs at a constant temp. I would be concerned with a hotter outside temp then colder.
It was -47c this morning here. My car blows warm air within 15 kms. This morning it was blowing warm air within 15 kms. Last week it was -10c and it blew warm air pretty much at the same mileage. I live out in the country. Same route same speed every day. I let the car warm up for 10 mins on the command start(timer on keychain) so everything to do with my morning routine is the exact same.
I will agree that there will be a few degrees variance but not the 30 you quoted.
I would guess at -30F they would make a lot of difference. I would estimate 130F oil temp with outside temps -30F at highway speed
Originally Posted By: JOD
My best guess: 100-105C. Stock, my '98 R was in that range at extended highway speeds. It's a very similar engine, just a little different exhaust manifold and tuned slightly differently. Obviously though, a temp gauge is the only way to know for sure. I'd keep in mind that oil temps at the turbo are obviously going to be quite a bit higher.
Ambient temps didn't make much of a difference on this car, maybe 2-3C max. What does make a difference is grade; it would climb quite a bit say driving up an extended 4-5% grade.
Maybe with an air cooled engine but a thermostatically controlled motor runs at a constant temp. I would be concerned with a hotter outside temp then colder.
It was -47c this morning here. My car blows warm air within 15 kms. This morning it was blowing warm air within 15 kms. Last week it was -10c and it blew warm air pretty much at the same mileage. I live out in the country. Same route same speed every day. I let the car warm up for 10 mins on the command start(timer on keychain) so everything to do with my morning routine is the exact same.
I will agree that there will be a few degrees variance but not the 30 you quoted.
I would guess at -30F they would make a lot of difference. I would estimate 130F oil temp with outside temps -30F at highway speed
I drive a lot in the evening and at night, so temps lately have been mid 20's to mid 30's, but in the summer we are in the 90's.
I also live in southern Indiana, so it's not flat like most of the state. We have hills and my turbo needle moves positive while going up hill with the cruise set. You also have to deal with traffic.
I also live in southern Indiana, so it's not flat like most of the state. We have hills and my turbo needle moves positive while going up hill with the cruise set. You also have to deal with traffic.
I can now see my coolant temps using an obd scanner. On the highway my coolant stays around 190 f, stopped it can climb to 199 range, and idling it can go to the 217 range. Driving hard you can see the temp climb quickly. Not sure how this relates to oil temps. I would think oil temps would be higher.
Oh, this was all with ambient temps in the low 60's.
Oh, this was all with ambient temps in the low 60's.
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