Everyone with oil temp issues

travisjb

here's the data on 6mt v 7at oil overheating
Oil Temp Survey

spearfish25

That final graph of 7AT vs 6MT only compares temperature and transmission. There are an untold number of variables not accounted for in that comparison that makes a generalized assumption of "the 6MT overheats more than the 7AT" incorrect. For example, 6MT owners may be the vast majority of the cohort who tracks their cars, they may be confined to a geographic location that has a warmer climate, etc etc.

All you can say is that, as a whole, 6MT owners have noted higher temperatures than 7AT owners. However, the results in NO WAY imply that under the same conditions, with the same driver, at the same RPMs, the 6MT runs hotter.

With regard to the transmission plumbing through the radiator of the 7AT, I don't know how that would provide any form of oil cooling for the engine.

travisjb

Not sure why you would think that the distribution of AT owners geographically would be any different than the distribution of MT owners geographically... my guess is that outside the pattern of more ATs in the US vs abroad, the distribution within the US (hotter areas vs not) would be similar for AT v MT.

I'm going to pull the excel spreadsheet with all the variables in the survey, and if you're curious you can go in and analyze. It includes variables for usage, ambient temperatures, transmission, miles on the car, and of course overheating patterns.

spearfish25

Sounds good. I'm not criticizing. I'm just saying that comparing two variables is far from a multivariate analysis of the issue. So, we have to be careful of the conclusions we draw. The geographic pattern is just a possibility...you'd be surprised about things you discover when you look into them. Maybe 6MT owners are clustered around race-tracks which may be more copious in warmer locations. Conversely, cold weather snow drivers may prefer the control of a 6MT over a 7AT. Heck, maybe dealerships around the country have different availability of each transmission that could cluster the results. Just hypotheticals...

travisjb

Spearfish... I'm too lazy to do the analysis, but here's all the raw data... as it turns out, country/state was captured by my survey software using the IP addresses... so if you want, you can actually compare region... not sure you need to though, because respondents actually included their hotest ambient temperature as part of the survey, which is the variable you're really trying to get at... would welcome anyone to slice/dice this

SurveyReport-1224538-5-8-2009.xls - FileFactory

PS I've got a "+1 rep" waiting for whoever analyzes this data !

spearfish25

I've posted a preliminary analysis in the Oil Temp Survey thread. Check it out here: Oil Temp Survey or the link below.

Attached Files

	370Z Overheating Comparison Charts.pdf (184.0 KB, 54 views)
	Overheat Comparisons.pdf (98.0 KB, 28 views)

ChrisSlicks

Looks good, but you've got the transmission type backwards on the first chart. The majority of respondents were MT not AT.