Alright, let's be honest; who here is considering a 6th gen?

Lying about the machining debris is just absurd. Now you can’t trust anything Toyota says.

 

I assume they still have the tooling for the 2UZ-FE and 1GR-FE, maybe if the current admin guts CAFE (or changes it) maybe they can make that decision then? I would certainly hope so.

 

The old engine and a new transmission would be great. I’d definitely buy that.

 

This engine has been failing for almost a decade. People with LS500s were reporting this issue back in 2017

 

I think that the 4 cylinder is reliable and they are still working out bugs in the tundras 6.

 

Great call!! Even if the new 25 was reliable I still would not budge putting out 14,000. Our 5th Gen are going to hold there value very well. Especially being the first year and have to deal with it being at the dealer for so many things. What people are paying and turning around trading it back in are taking a loss.

 

I'd imagine that when combined with the 8-speed trans and advances in aerodynamics, the 5.7 wouldn't be too far off the mileage they're getting with the 3.4.

 

Well that makes the situation even more ridiculous. Why in the hell would they take a problem motor from a low production vehicle and put it in a mass produced truck?

 

BINGO
I have been saying it to friends over a year now, and publicly online a few months. I think its either tuning, detonation, knocking the rod bearings out or starving for oil. The engines have piston squirters and oilers on every bearing journal. Its hard to say its oil, which is what pushes me to think its detonation from crappy fuel and bad tuning. The tear downs showing blued and spun rod bearings all tell me detonation.
Regardless, i stepped our oil up on our 2023 to 5w30 and have been contemplating 10w30 even though its a non turbo and virtually bulletproof 1GR-FE. The Honda and Ford truck turbo tear downs at 100,000 miles or less and the turbo is sludged up and have tons of shaft end play point to oil being too thin and getting cooked and losing viscosity. The blued and spun rod bearings in the Toyotas makes me lean more heavily toward pre-ignition.

 

I think Taco engine issue is very similar to what happened to GM - oil boundary condition breakdown during high load at low RPM. Motor oil geek goes into details - https://www.youtube.com/watch?v=pbEdr6Q6cKw.

Regarding 5th Gen, in a different discussion I dug up Toyota manual from I think Mongolia, where they still recommend 10w30 oil for 1GR-FE equipped vehicles. However, I think there is overwhelming body of evidence (units * miles driven) that 0w20 is fine in 1GR-FE. My view is that you will get more benefit from more frequent oil changes rather than playing with viscosity. Unless you frequently tow at near towing limit with your 5th Gen, I wouldn't worry about viscosity.

 

https://www.youtube.com/watch?v=2pWA__4nX9I

 

My manual (2019) recommends oil as thick as 15W-40 for Puerto Rico.

It also says:

"An oil with a higher viscosity
(one with a higher value) may be better suited if the vehicle is
operated at high speeds, or under extreme load conditions."

I do agree that 0W-20 is fine for most people's use of the 4Runner. However, I don't feel bad using 5W-30 with full armor, oversized tires, and a roof rack.

 

There aren’t many instances of 4Runner engines seizing up. I wouldn’t worry about oil weight at all.

 

I wouldn't, either. I'd read the manual, which recommends higher viscosity in some situations, and then make my own judgment.

 

I am sure Toyota did 0w-20 to please the EPA... lighter oil = less friction and supposedly better MPG?

Either way... CAFE is over! Seems like the current administration got rid of it.