[bluekitty]

Hi. What operating temperature do you wait for the car to get up to before starting to get on the gas? Obviously it's not good to give it full throttle when it's cold. Mine gets to about 170F in about 8 minutes of operating. I don't go full throttle until it's warmed up all the way (200F+), but I start getting into it around 180F. At what temperature is it safe to give it full throttle?

Thanks,

Kitty

[aerobod]

Originally Posted by bluekitty

Hi. What operating temperature do you wait for the car to get up to before starting to get on the gas? Obviously it's not good to give it full throttle when it's cold. Mine gets to about 170F in about 8 minutes of operating. I don't go full throttle until it's warmed up all the way (200F+), but I start getting into it around 180F. At what temperature is it safe to give it full throttle?

Thanks,

Kitty

Normally 70C / 158F oil temperature (coolant will be fully warm) is what I use on most cars as the safe temp to go flat-out.

[RockCrusher]

Originally Posted by bluekitty

Hi. What operating temperature do you wait for the car to get up to before starting to get on the gas? Obviously it's not good to give it full throttle when it's cold. Mine gets to about 170F in about 8 minutes of operating. I don't go full throttle until it's warmed up all the way (200F+), but I start getting into it around 180F. At what temperature is it safe to give it full throttle?

Thanks,

Kitty

I wait until the *oil* temperature is 210F. See pic.

If you don't trust the gauge you can use: Hey BMW. What is the engine oil temperature? and the car will tell you.

I don't know what the low oil temperature threshold is for engine safe full throttle operation. I expect it can differ -- some -- from engine to engine.

But I know it is safe when the oil is at the point in the picture.

The time it takes the oil to get up to temperature also gets the tires warmer.

[aerobod]

Originally Posted by RockCrusher

I wait until the *oil* temperature is 210F. See pic.

If you don't trust the gauge you can use: Hey BMW. What is the engine oil temperature? and the car will tell you.

I don't know what the low oil temperature threshold is for engine safe full throttle operation. I expect it can differ -- some -- from engine to engine.

But I know it is safe when the oil is at the point in the picture.

The time it takes the oil to get up to temperature also gets the tires warmer.

The safe max throttle oil temp should be anywhere above the blue (~65C / 150F) to below the red (~135C / 275F), with mid temp being at 100C.

[IanH]

Oil viscosity is asymptotic to the viscosity at operating temp.

Meaning, generally and in practice, that most oils have achieved 80% of their target viscosity by the time they are half way up to temp. You can be comfortable that everything is well lubricated at this point.

I would agree with other posters that 150f is a safe number. Still don't go completely wot and push the car to max rpm until at full operating temp..

[Albator_IIII]

Originally Posted by aerobod

The safe max throttle oil temp should be anywhere above the blue (~65C / 150F) to below the red (~135C / 275F), with mid temp being at 100C.

Been doing the same. Once it is not blue anymore, I start to get the revs above 2,500 RPM and gradually push the car.

On my 335i, I do the same once I see the oil temp gauge starting to move (Sport Package) which is usually once the computer gives me a level reading.

[RockCrusher]

Originally Posted by aerobod

The safe max throttle oil temp should be anywhere above the blue (~65C / 150F) to below the red (~135C / 275F), with mid temp being at 100C.

Maybe. I don't recall seeing any thing official from BMW regarding what is the lowest acceptable temperature at which max throttle can be used.

I found this under the Launch Control heading...

Launch Control is available when the engine is at operating temperature. The engine is at operating temperature after an uninterrupted trip of at least 6 miles/10 km.

That 6 miles number is only valid -- at least in my experience with my M8 (and before it the M2) -- on pretty warm days.

Had the M8 out yesterday in 30F temperature -- tires were >40F from the car being parked in a garage -- and it was at least double that 6 miles before the oil temperature got close to the 210F hash mark.

I err on the side of caution and wait until the engine is up to full operating temperature. This also ensures the automatic transmission fluid and AWD fluids are up to temperature, too. Well, at least hotter than they would be with less engine run time/driving time.

[aerobod]

Originally Posted by RockCrusher

Maybe. I don't recall seeing any thing official from BMW regarding what is the lowest acceptable temperature at which max throttle can be used.

I found this under the Launch Control heading...

Launch Control is available when the engine is at operating temperature. The engine is at operating temperature after an uninterrupted trip of at least 6 miles/10 km.

That 6 miles number is only valid -- at least in my experience with my M8 (and before it the M2) -- on pretty warm days.

Had the M8 out yesterday in 30F temperature -- tires were >40F from the car being parked in a garage -- and it was at least double that 6 miles before the oil temperature got close to the 210F hash mark.

I err on the side of caution and wait until the engine is up to full operating temperature. This also ensures the automatic transmission fluid and AWD fluids are up to temperature, too. Well, at least hotter than they would be with less engine run time/driving time.

For cars that I know of with variable redlines (E46 M3 / Z4M, E90/2/3 M3 and RS4), the max revs indicator seems to hit the full range at ~60C (140F) oil temp. My 2007 Z4M gave me a data point consistent with this.

Our 2021 Macan S never gets above 85C oil temp at steady highway speeds when the ambient temp is below -20C, this seems to be the oil cooler thermostat opening temperature. Porsche also show normal oil temp is reached at 70C.

Caterhams with the higher performing engines will cruise all day at highway speed and 15C ambient with a 65C oil temp, requiring max revs to bring the oil temp higher, as the oil cooler size is designed for flat out track use and doesn’t have a thermostat. On track I have to get my rev range up to max to get the oil into the 100C range.

I would say overall the fairly low revving S58 should be fine above 60C oil temperatures, with the BMW engineers determining 60C was fine in the higher revving S54 and S65 to indicate the full rev range was available.

[RockCrusher]

Originally Posted by aerobod

For cars that I know of with variable redlines (E46 M3 / Z4M, E90/2/3 M3 and RS4), the max revs indicator seems to hit the full range at ~60C (140F) oil temp. My 2007 Z4M gave me a data point consistent with this.

Our 2021 Macan S never gets above 85C oil temp at steady highway speeds when the ambient temp is below -20C, this seems to be the oil cooler thermostat opening temperature. Porsche also show normal oil temp is reached at 70C.

Caterhams with the higher performing engines will cruise all day at highway speed and 15C ambient with a 65C oil temp, requiring max revs to bring the oil temp higher, as the oil cooler size is designed for flat out track use and doesn’t have a thermostat. On track I have to get my rev range up to max to get the oil into the 100C range.

I would say overall the fairly low revving S58 should be fine above 60C oil temperatures, with the BMW engineers determining 60C was fine in the higher revving S54 and S65 to indicate the full rev range was available.

That's all well and good but your belief the engine should be fine with the oil temperature above 60C (140F) is not sufficient for me to use that number.

With my M2 now with my M8 I observe under various ambient temperatures and a mix of driving -- though no track in the mix -- once the oil temperature gets to 210F the engine oil stays at the 210F level pretty darn consistently. That is I see it go up or down what looks to be a few degrees but in hardly any time it is back at that 210F mark. So far when I have asked the car for the engine oil temperature the temperature was either at 210F or a few degrees above or below 210F. A few degrees not even +/- 10F degrees.

This suggests to me BMW considers the oil's ideal operating temperature is 210F. As an aside I note the oil's high temperature viscosity index is measured at 212F so there's an argument the oil's ideal operating temperature is 212F. Close enough to 210F...

Thus I will drive the car until I see the oil temperature reach that 210F temperature before I subject the engine to high RPMs and loads.

[IanH]

Originally Posted by RockCrusher

That's all well and good but your belief the engine should be fine with the oil temperature above 60C (140F) is not sufficient for me to use that number.

With my M2 now with my M8 I observe under various ambient temperatures and a mix of driving -- though no track in the mix -- once the oil temperature gets to 210F the engine oil stays at the 210F level pretty darn consistently. That is I see it go up or down what looks to be a few degrees but in hardly any time it is back at that 210F mark. So far when I have asked the car for the engine oil temperature the temperature was either at 210F or a few degrees above or below 210F. A few degrees not even +/- 10F degrees.

This suggests to me BMW considers the oil's ideal operating temperature is 210F. As an aside I note the oil's high temperature viscosity index is measured at 212F so there's an argument the oil's ideal operating temperature is 212F. Close enough to 210F...

Thus I will drive the car until I see the oil temperature reach that 210F temperature before I subject the engine to high RPMs and loads.

2 threads in a row where you just spew nonsense.

210 is the operating equilibrium temperature of the engine but that has nothing to do with what temperature the oil viscosity has reached a point at which it is fully lubricating the engine.

What you are saying is akin to observing that water is always ice when its 0 degrees F, then declaring the freezing point of water to be 0 degrees F