Ahh the oil wars… whether its viscosity, brand, synthetic vs non or what mileage.
Never ends.
As soon as I think I may stretch my mileage I see tear down vids on YT about sludging.
During old times, break-in oils were normally changed by 500 miles. As tolerances and oils got better, manufacturer's quit stating it was needed.
Can it hurt? No
Is it really necessary? Probably not, though debris in blocks (like Toyota) do ruin engines.
- Toyota and Lexus will replace roughly 100,000 engines in Tundra trucks and LX SUVs built for the 2022 and 2023 model years.
- The replacement engines will resolve a May recall caused by machining debris left in the engine during the manufacturing process.
A commentor on the above article said “Any talk of Toyota coming up with a "fix" for this is idiotic. The "fix" entails disassembling the entire engine (because this metal debris has been pumped throughout the engine by the engine oiling system), cleaning everything, replacing all damaged parts including the oil pump, and reassembling the engine. In other words, the financial cost of doing this is WAY in excess of just putting another brand new engine in the vehicle.”
Reference is from thedrive.com dated 31 May 2024