2nd Aug 2021, 00:03
Supposed sludging? Not even close. Even a simple Google search of "Toyota engine sludge" will give you pages of the years and engines 4 and 6 cylinder that had the problem. "Look it up". If you have the hours to spare. While you're at it, look up the current oil consumption problem that owners are filing a class action law suit over.
31st Jul 2021, 19:57
Cold spots in engine passages in the Toyota block. Causes sludging even with frequent oil changes.