355 Slightly thicker oil for summer?

Thinking about going to slightly thicker oil (10-40) for the the summer since I’m here in Texas and temps get over a 100. Will that help the oil from thinning out so much and also help in a hotter climate.


Sent from my iPhone using FerrariChat

 

Going from a 5-40 to 10-40 makes absolutely no difference for hotter climates. This subject has been beaten to death. Use the search option.

 

Its the second number. Here is your oil resource. https://www.bobistheoilguy.com/forums/ubbthreads.php/forum_summary

 

It appears that 5-40 actually has higher hot (100C) viscosity than 10-40. I looked at a few datasheets of different oil brands and found that at 100C 5-40 has viscosity between 14 and 15 whereas 10-40 has between 13 and 14

 

It really depends on the oil type and brand. Hers are the Pennzoil specs for 0w40 and 5w40. Note the 10w40 is Amsoil motor oil. But note that even 0w40 has higher viscosity at 40*C than any of the oils at 100*C. Ther eis really no reason you could not run 0w40 in most climates.


Image Unavailable, Please Login

 

SAE J300 defines that a 40 oil can have a kinematic viscosity between 12.5 and 16.3 cSt.
So for me the AMSOIL XL for me is a little on the high side. A 50 oil starts at 16.3 cSt.
http://www.lube-media.com/wp-content/uploads/Viscosity-matters-WEB-ONLY-Sept19c_FINAL.pdf

The viscosity index of above 180 tells me that this is a synthetic oil. Meaning that not so much viscosity improvers have to be added.
They can degrade with time.
The other two a standard mineral oils.

 

Just reminded me that I have a number of documents on Amsoil engine oils. I have found that Amsoil 10w-40 Premium Protection oil is probably a very good choice for the 348/355. Not only its viscosity but, more importantly, it has a very good ZDDP content (hard to find these days).

Image Unavailable, Please Login

Image Unavailable, Please Login

 

instead of looking your local weather, you need to look at your engine oil temp.

My Scud takes forever to get to 190F with normal 15 min driving.
My GT350R will hit 240F just idling (for 30 minutes), just did that today.

if you track a car, some car will never top 250F, some cars will hit 295F all day long even with an oil cooler. some will be over 300F stock, you really need 10w-60 then.

 

Here is the latest from the Amsoil web for their XL oils for gasoline powered vehicles. The AMO are really meant for diesel applications, but can be used in gas powered as well.

Image Unavailable, Please Login

 

Amsoil has a zrod oil with high zddp. Also redline as well. Both have more then most oils.

 

It's not really needed because most people don't put that many miles on between oil changes. According to a research paper I read on flat tappet wear (thought I had it saved somewhere but can't find it) higher Zddp doesn't protect better, just longer because the zddp breaks down over time and usage.

 

What is specific reason that ZDDP would be of benefit with F355 engine?

 

flat tappet cams. https://www.hotrod.com/articles/ctrp-0807-flat-tappet-cam-lubricants/

 

Politics, religion and oil type discussions always bring a crowd. Its like Walmart, no one ever admits going there but you always see everyone there!

 

just use 0w40 all year round

 

LOL,

Image Unavailable, Please Login