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thstone · 04-23-2016, 02:22 PM

I agree, it depends on the temps that you see at the track. Here in SoCal, I run 10W-40 and understand why Mike runs 20W-50 out in Texas.

I also do fewer track events in the heat of the summer or go north where it is often a bit cooler. I feel that 10W-40 is fine for Laguna Seca in August.

04-23-2016, 02:22 PM	#4
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	I agree, it depends on the temps that you see at the track. Here in SoCal, I run 10W-40 and understand why Mike runs 20W-50 out in Texas. I also do fewer track events in the heat of the summer or go north where it is often a bit cooler. I feel that 10W-40 is fine for Laguna Seca in August. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor