But the argument for using the Techron additive WITH Top Tier fuel is not clear to me.
I think he was saying that since gasoline engines (especially direct injection) are susceptible to fuel dilution in the oil, using supplemental fuel detergent can reduce this by insuring the injectors are clean. He recommended a bottle of Techron every 3K miles to reduce engine wear by reducing fuel dilution. (Dirty injectors can increase fuel dilution)
Not sure why he said that, maybe he misspoke. I don’t watch all his videos, but I have seen where he previously recommended oil changes every 5K miles, after the engine was broken in.And that dude apparently recommends 3,000 mile oil changes...lost my respect there...