[Lucky13]

A couple of points. As far as I know when the 335 was introduced in 2007 it had an oil cooler on all cars with the sport option, my 2007 E93 335 did but you had to have the sport option. I rarely checked engine oil temp and when I did it wasn't to see if it was warm it was to see if it was overheating in heavy traffic which it never did. Having driven BMW's for 20 years including 3 E46 M3's you learn they need to warm up before you push them. I really don't need a gauge to tell me this. If I pull out of my neighborhood and need to get up to speed quickly because someone came over the hill and is bearing down on me I could give a shit about what a needle says I'm going to punch it. If someone is dumb enough to start a cold engine on any car and run the shit out all the time then a gauge really doesn't matter. Common sense tells me how long it takes to warm up to an acceptable level. Would a gauge be nice, yes. Is a gauge going to change my driving habits, no. To me the biggest benefit is not the warm up stage but for overheating. I think the range on the gauge was a little off on the 335 because actually the car was already warm on the 335 before the needle moved into the artificially high range that was displayed. Not sure what the range on the display is on the M235 is since mine doesn't have one. This was actually addressed by some car magazines some years ago regarding the oil temp range on the 335 being higher than needed to show your car was adequately warmed up.