Molecules in the gas state move much faster than their liquid or solid states. Depending on the temperature and pressure, molecules can exist in three states: gas, liquid, o â¦ r solid. At high temperatures and low pressures, the gas state is favored.
I have been told that if you start using synthetic lube oil, you must continue. Going back to regular oil will damage the engine. That does not make sense to me.
If you are using a high quality synthetic oil, there is no need to change before 10k miles. If you are using dino oil, then by all means, change at 5k miles. I am glad that Toyota finally jumped on board with what other manufacturers have been doing for years. If you are worried about it, run it for 7500 and send a UOA to Blackstone Labs.