Thicker Oil Recommendations

[balboky01]

Just curious if anyone runs a heavier oil in the summer. I run Synthetic 5w30 year round but was wondering if anyone goes with 10w30 or 10w40 for summer use. I plan on tracking the car a few times as well and figured it may help for the HD use. Opinions are welcome

 

[SHOdded]

Never did say where you are located, Matt. I suppose if you are in a warmer climate like AZ or TX or FL, you could justify 10Wxx for heavy track use. I don't see anyone needing to though, based on WOT reports and 1/4 mile times etc. Haven't heard of anyone regularly autocrossing either. A colder TStat and a proper tune to go with have held temps to under 210F even at maxed out speeds (for short periods of time).

5W30 is standard now for 2011+ SHOs, I believe. 5W20 for the 2010. I presume you run Full Synthetic, which one do you use?

 

[balboky01]

Thanks, I'm near Chicago so we dont have very hot weather but I figured it might help. I know I ran it in my '13 5.0 during the summer and it seemed to run a little better on it and didnt burn as much. I run Castrol Syntec on both my cars.

 

[rubydist]

going to a 10Wxx will do nothing for you at the track. the 10Wxx v. 5Wxx just means that at -25F the oil flows better; at operating temperature the viscosity specification is exactly the same for the two oils, there is no difference.

if you are concerned about it, make sure you are using a fully synthetic oil like the Motorcraft synthetic.