Oil temps: 335 comparitive observation.

spearfish25 · 05-17-2009, 10:40 AM

This is interesting news. One of the issues I've had with judging how much of a problem I'm having with my Z's temps is that I don't know what the spec range for oil temperature is supposed to be in the first place. A number of people, including my dealer have said that 220 to 240 is the sweet spot. 260 has been getting people's attention and the Z goes into a limp mode around 280. Other's have said that the properties of regular oil degrade above 260F and that the engine has components that are temperature sensitive above that temp as well. The validity of these claims I don't know myself.

Could one car be engineered to withstand higher temps than another...sure, but I don't know if that's the case. What kind of oil is BMW recommending in the 335? If it's not synthetic, that either debunks the "oil breaks down over 260F" theory or suggests your buddy's car is running too hot as well.

Again, interesting to hear that a BMW runs consistently as hot or hotter than the Z is.

05-17-2009, 10:40 AM	#2 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1858	This is interesting news. One of the issues I've had with judging how much of a problem I'm having with my Z's temps is that I don't know what the spec range for oil temperature is supposed to be in the first place. A number of people, including my dealer have said that 220 to 240 is the sweet spot. 260 has been getting people's attention and the Z goes into a limp mode around 280. Other's have said that the properties of regular oil degrade above 260F and that the engine has components that are temperature sensitive above that temp as well. The validity of these claims I don't know myself. Could one car be engineered to withstand higher temps than another...sure, but I don't know if that's the case. What kind of oil is BMW recommending in the 335? If it's not synthetic, that either debunks the "oil breaks down over 260F" theory or suggests your buddy's car is running too hot as well. Again, interesting to hear that a BMW runs consistently as hot or hotter than the Z is.