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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > 335iS Track Day



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      04-21-2015, 03:12 PM   #1
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335iS Track Day

Hey All -

Just did two track days at Summit Point here in WV. Did one day at the Jefferson Circuit and another at the Summit Point Circuit.

I have 6 track days under my belt and am still working to improve skills. My 2012 335iS is pretty stock. 6 Speed. Only modifications are m3 shifter and Michelin Pilot Super Sports.

Brakes were fine a bit of fade but nothing of concern. Tires are amazing - gotta live the Super Sports. They really talk to you and have an immense amount of grip. Stock suspension is fine. I've had Ohlins / M3 Bits on my old 135i but don't feel the need to upgrade this suspension yet.

Thought I'd post these two videos:

1. e36 M3 Spinning out after dropping two wheels



2. Video of me driving around


Question:

My oil temp gauge reads about 250 in the middle and 340 at the hot end. I was running between 280-300. It was about 70 degrees and I was pushing the car hard. Is this normal?
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      04-21-2015, 11:05 PM   #2
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290f is definitely way too hot. I fooled around with various engine oil using hot plates at my work. Oil really starts to degrade and smelling like it is burnt at 300f. I would change out those oil asap.

Get an upgraded oil cooler. You really should try to keep oil temp under 270 F in such condition.
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      04-22-2015, 02:59 PM   #3
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Quote:
Originally Posted by Cloud9blue View Post
290f is definitely way too hot. I fooled around with various engine oil using hot plates at my work. Oil really starts to degrade and smelling like it is burnt at 300f. I would change out those oil asap.

Get an upgraded oil cooler. You really should try to keep oil temp under 270 F in such condition.
Yeah it stayed at or around 270 until the last session of the day. I think around then it ranged between 270-290ish. Oil is being changed today.
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      04-22-2015, 03:50 PM   #4
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Quote:
Originally Posted by Cloud9blue View Post
290f is definitely way too hot. I fooled around with various engine oil using hot plates at my work. Oil really starts to degrade and smelling like it is burnt at 300f. I would change out those oil asap.

Get an upgraded oil cooler. You really should try to keep oil temp under 270 F in such condition.
The company I used to work for used to sell lubricants, and we've sent out various oil to 3rd party labs using our own dime to test the effects of heat on lubricant. The lab test shows, anything above 210F, for every 20F increase, it effectively decreases the usable lubricant lifetime by 1/2.

At 290F, the usable life of the lubricant is cut down to ~6% of its original usable life.

Now, granted, we're not operating the oil constantly at 290F all the time, but the high temp can't be good for the oil nor the engine, period.
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