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Old 01-23-2013, 10:23 AM
Zooks527's Avatar
Zooks527 Zooks527 is online now
Winding up the M235xi
Location: Mansfield, MA
Join Date: Mar 2009
Posts: 5,665
Mein Auto: 2015 M235xi / 2005 Tacoma
Originally Posted by DSXMachina View Post
It's near zero F. these mornings in NH. If anyone would like to see the data I'll start from cold tomorrow morning and scan coolant temperature and oil temperature on my way into work. Then I'll post the graphs and you can see what happens when.
Please note that this will pain me greatly. Ilsa prefers to hibernate for the Winter but she'll do it in the interest of furthering the collective knowledge. Ask nicely.

(I've done this before, but didn't save the graphs. There are lots of interesting data points.)
I can scan coolant temperature on the fly, but can't find the PID code to get oil temperatures or I would have done it out of curiosity. You don't happen to know it, would you?

I hit peak coolant temperature after about 6 miles (4 on highway). As noted, oil temperature is still slowly rising even after 30 miles.

Originally Posted by raleedy View Post
Not really. The bottom peg on the oil temp gauge is 160 Fahrenheit. That's much higher than ambient temperature. The engine is warmed up long before the needle moves.
You have a far looser definition of "warmed up" than I do. I'd guess the crankshaft is still going to grow another 0.1" in length by the time it reaches 240 from 160, with the same thing going on for the diameter of items stuck into bearings.

Regarding the ever popular "when can I punch it" question, I'll keep mine below 3000 rpm while the needle is still on the peg, and I won't really get on the throttle until I'm past 200 on the oil.

Originally Posted by jburke4689 View Post
It is possible in conjunction with the N54 engine's electric coolant pump even after the engine has been switched off to dissipate the residual heat from the turbochargers and thus prevent the lube oil in the bearing housing from overheating.
This is a nice feature, which alleviates the "drive like your grandmother for the last 5 miles" advice you typically hear for a turbocharged car. Also prevents the interminable "Where can I get a TurboTimer for the N54?" threads.
2015 M235xi coupe, Black Sapphire Metallic, Black Leather, Fineline Stream trim, Steptronic, xDrive, ZPP, ZTP, ZCW, ZDA, ZDB, 5DP, hk w/ BimmerTech amp, Enh. BT
Ordered 3/12/15, Off the line 4/7/15, Delivered 5/14/15

Prior 40 years of cars: 1967 BelAir wagon / 1968 LeMans Tempest / 1970 Mustang Mach 1 / 1972 El Dorado / 1978 Corvette / 1981 Subaru GL wagon 4WD / 1983 s10 Blazer 4x4 / 1985 Bronco 4x4 / 1996 Bronco 4x4 / 2004 Passat 4motion / 2009 BMW 335i xDrive E92

Last edited by Zooks527; 01-23-2013 at 12:41 PM.
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