Engine oil OEM Toyota or ZIC

See how much metal that 08 weight pisswater has generated after only 1.3k miles? Switch to 0w30/5w30 and you'll see a drastic reduction in wear. I know I did.

Forgive me but I’m confused. The Tundra doesn’t have two separate oil reservoirs that I’m aware of and I change my own oil. Also, for what it’s worth mines been flawless since 2022 and almost 40,000 miles (not that that is a lot but just saying).

While I didn't own a 2018 (mine was 2013 hybrid -> 2022 prime), here's my short list:

Electric gives a huge increase in torque from 10-50mph

Mechanic told me the oil came out barely darker than it went in on the last change. ~80% electric miles

I’ll do the 15k oil change soon with Toyota OEM 0w-16, which is made by M1 but has a much higher moly content than the regular retail M1 oil.

My 2009 1.33 likes both 5w30 (or 0w30) and 0w20. Out of the factory they came with 5w30, but toyota later recommended the switch with the 1.33 engine. With normal use and lower speeds 0w20 is best, if you drive a lot at higher rpms than 5w30 would be better (at130kmu/3200rpm 5w30 is smoother).

I tried 10W40 in my car as 5W40 was beyond my budget at the time and it's been great.

Before 2023 i was using zic 0w20 but caltex has newer technology

Used this for my old Alterra that made it to 250k mileage. Good budget option.

If you are using ToyotaCare, they will push 10k/1yr oil change interval. If you willing to pay for every oil change, they don't care.

2000s Toyotas. Not really unreliable, but oil burning was an issue on most of these because people did not change the oil on time.