Does this concern anyone? As an old guy this seems scary as hell !! You're allowed to use 0w16 on occasion but must switch back to 0w8 on the next oil change. The 2.0 engine is pretty advanced engine with temperature management and i guess someone way smarter than me figures this is the right move, but holy smokes, whats next -5w0 oil??
Does this concern anyone?
At first glance it's a little unsettling to see the lower numbers. This also happened when the first 5W-20 oils hit the market. Old guys like me were concerned, but as it turned out there was no reason for concern because the newer oils were actually better than their predecessors. The viscosity of these newer oils is just as good as the viscosity of the previous oils so proper lubrication is maintained. https://www.sae.org/publications/technical-papers/content/2020-01-1425/
interesting stuff.
.
"For this new oil, we reduced the friction coefficient under boundary lubrication regime by applying an oil film former and calcium borate detergent. "
do I detect a small amount of cynicism? lol
No, not cynicism. I always reserve a little bit of skepticism, but I actually did find this interesting.
The stuff that the SAE publishes is public and documented, and therefore SHOULD be reproducible in lab, so it's unlikely they would make it up. Are these additives in fact JUST as good as thicker oils? It's not worth it for me to buy the paper for $37, and then pay thousands of dollars to a lab to verify the results.
{black}:idontknow:
Time will tell I guess. I'm just glad I'm not shopping for a new vehicle right now. 🙂
@mmj "Time will tell I guess. I'm just glad I'm not shopping for a new vehicle right now."
ME TOO!!! (sorry for shouting) 😉
I'm sure it's OK for the new Corolla but I would probably not try the stuff in something like a '65 Chevy.
It has a lot do to with low tension piston rings. I have a complete piston assembly from a 2010 Dodge Journey that I found at the scrapyard. That used 5W-20. You can squeeze piston rings with your hands. Back in the day, you needed special tools to even think about putting one inside of an engine. It's all in the name of getting better gas mileage, and I'm sure there is probably a lot of blow-by.
