Originally Posted By: Bryanccfshr
There is more to protection than kinematic viscosity that is beyond most of us amateurs on this board.
I think the a 5w20 or 0w20 will work great in your application. With Toyota's outstanding cooling capacity and the coolant to oil heat exchanger your oil temperature is more controlled than most other light truck applications. Under heavy load that 20 wt will be as viscous as a 30 wt in a similar application without that Toyota oil cooler because the oil will remain controlled by the coolant temperature. That and the sump capacity, aluminum block and heads, the multiple oil squirters etc. make running a 20 wt as recommended a simple decision.
This is the whole reason i have continued to use the 20w. I will probably just end up sticking to the oem requirements.
I wouldn't be a bit surprised if my used oil analysis comes back saying your motor is still in the break in process which is the reason the oil looks spent (15k). Going off the other tundra used oil analysis, i can see this being the case. His had 22k miles and was told the break in process is subsidizing now, and the engine is wearing nicely. BUT..... his driving conditions are much much different than mine with virtually no towing. So we'll have to wait and see i guess.
Thanks for your response.
There is more to protection than kinematic viscosity that is beyond most of us amateurs on this board.
I think the a 5w20 or 0w20 will work great in your application. With Toyota's outstanding cooling capacity and the coolant to oil heat exchanger your oil temperature is more controlled than most other light truck applications. Under heavy load that 20 wt will be as viscous as a 30 wt in a similar application without that Toyota oil cooler because the oil will remain controlled by the coolant temperature. That and the sump capacity, aluminum block and heads, the multiple oil squirters etc. make running a 20 wt as recommended a simple decision.
This is the whole reason i have continued to use the 20w. I will probably just end up sticking to the oem requirements.
I wouldn't be a bit surprised if my used oil analysis comes back saying your motor is still in the break in process which is the reason the oil looks spent (15k). Going off the other tundra used oil analysis, i can see this being the case. His had 22k miles and was told the break in process is subsidizing now, and the engine is wearing nicely. BUT..... his driving conditions are much much different than mine with virtually no towing. So we'll have to wait and see i guess.
Thanks for your response.
Last edited:
