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Old 12-19-2012, 06:31 PM   #24
Scooby Specialist
Member#: 43950
Join Date: Sep 2003
Chapter/Region: MWSOC
Location: Minneapolis, MN
07 WRX LTD Wagon
Satin White Pearl


Originally Posted by bluesubie View Post
The sad thing is that many ignorant assumptions will continue since more people will read a thread asking if anyone loves Mobil1 instead of a thread containing data. Adding that my engine didn't blow up using M1 was just to get more views. Otherwise, it would get only about 50 views.
Exactly why I put "M1 Good" in my thread title, though it was also total troll bait.

I love the Widman viscosity graph. Sometimes we debate over 2-3 cst's at 100C when the viscosity in freezing temps and below have a much larger gap! As the graph shows, the first number in a multi-viscosity oil does not tell you the actual viscosity at a given temp and does not mean than a 0W-x is thinner than a 5W-x.

Yea, it really brings into focus just how robust engines are when dealing with different viscosity oils. Look what they have to contend with, and that graph only goes down to 0*C!

The other thing that graph should highlight for us is how much we should focus on temperature when selecting oil. All it takes is for your oil temp to stabilize 10*C lower for 30wt to turn into 40wt.

Doing track days at Firebird raceway (Phoenix)? You'd better have 5w40 syn, maybe with an oil cooler. Lots of highway cruising in a Minnesota winter? M1 0w30 will be fine. The BRZ may help a lot with this, someone on ft86club found out it has an oil temp probe available through OBDII. Hopefully we'll see more data logs of oil temp in different driving conditions soon.
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