2027 toyota prius

LOL. That is because it is summer and very hot, not because it is 0W-16. An oil’s viscosity decreases greatly with increasing temperature. Try pouring it in subfreezing weather or after you put the bottle in a freezer.

 

Yeah, I doubt it is oil. More likely it's a software change to the VVT-i system. Maybe a little more aggressive on the intake cam when the system is asked for max power.

There's no links in the NCF linking to any changes in the engine, so I'm fairly sure it's just software and no physical changes.

 

It is interesting that the torque hasn’t changed. It could be that they have increased the maximum rpm because thinner oil lets you run higher rpm.

 

I didn't include that in my earlier post, but all hp rpms were listed at 6000.

 

OK, then, they must have increased the torque at high rpm. It is probably a software update, as you said.

 

Listed torque ratings are the same at 139 lbft at 4400 to 5200rpm for both the 2026 and 2027 versions. (188 Nm)

 

But hp equals torque times rpm. Perhaps something changed in the electric motors.