An engine flush is something that can be bought over-the-counter, and it's also a service sold at quick-lube shops.
Basically, the engine flush is added to the oil, the engine is started and run for a few minutes, and then the engine is shut off and the oil is emptied as part of a normal oil change. I guess it's supposed to dissolve sludge or something, if it exists.
At the quick lube shops, they often increase the rpm's above idle--maybe to speed up the process--but the engine flushes always caution not to drive the car after adding the engine flush, so it seems possible that the increased rpm's could be causing some sort of engine damage.
Engine Sludge 2035How many is that? There is a broad spectrum of how owners treat their vehicles in both driving and maintenance. The worse extreme in either (or, heaven help us, both...
My own car has been doing well with conventional Valvoline 10W-30 and then adding a bottle of Valvoline Synpower Synthetic Oil Treatment (the only one that seems to exist for the Valvoline brand of oil treatments) purchased over-the-counter from an auto parts store. It's not a Toyota, but Nissan actually allows up to 7500 miles between oil changes for mostly freeway driving, though I've usually changed the oil around 5,000 miles, give or take a few hundred miles. More than 90,000 miles later, it's still got power, with no apparent misfiring or other Service Engine Soon codes being reported.
