Hello,
I recently purchased an used 07' 328i convertible and when I was driving around I noticed the oil temp reaching 250F. I read on here that it is normal but im still worried its pretty high. I was wondering if there was something I could buy or do to the car to lower it.
Sure is normal when you pushing
When you drive in the City become lower.
Whey of driving or where you been driving - how loaded was car and speed ?
Use best Synthetic Engine Oil if not you engine going to call emergency.
Your owners manual should tell you the normal operating temperature range. For my European 325i it's 212F to 248F. So you're at the top end, but do you live in high ambient? Is it like this all the time, or only after a hard drive? Is the car due an oil and filter change? Have you checked the coolant level?
As you said, you're looking at the oil temperature, not the water temperature. 240 - 250 is normal. After 2007, they changed the scale for the oil temperature to put 250 in the middle of the gauge, mostly to address people asking why it was always over at the right side of the gauge.
As a side note, your water temperature is likely somewhere similar, and is also normal.
Even if you could buy something that would lower one or the other of the fluid temperatures, you would not want to lower them. The car is designed to run at those temperatures. It reaches its best efficiency there, and all the bearing and mating surfaces are running at their correct tolerances at that point. If BMW could come up with appropriate materials to support it, they would run it higher, the increase the efficiency even more.
Agreed, with the exception of the water temp being about the same. Most cooling systems, regardless of the make, will typically operate between 190-220* these days. If you were seeing water temps in the 240+ range, you'd likely be pushing water out and boiling.
250* is dead center on my 2011 328i, and I'm sure BMW changed the gauge to allay the fears out there. In colder temps, it runs at about 240*. With the temps going up, it's now between 240-250* on a regular basis. I'm curious to see what it goes to when I see ambient temps over 100 this summer.
When I first bought the car, it didn't dawn on me right away that was an oil temp. Talk about a shock seeing those numbers and thinking it was a water temp Made a lot more sense once I saw the gauge topping out at 340* and the oil can logo.
Dont be so precise all is in tolerance 240F 250F 280F 300F just perfect
You cant cheat on engine oil using cheap recycle oil
You need best synthetic engine oils
If you cool down to 100F and race this engine you killed in 1 hour of driving
Engine need heat to set pistons rings and oil to lubricate fast flow
Some performance cars have on dash engine oil temperature saying to driver when he can race that car.
What I see so many peoples cant understand means of proper engine oil temperature
trying to compare to engine cooling system
Future engines coming more powerful and very hot.
Getting from 1 liter displacement 150HP lots of power
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