Does Royal Purple oil clean valves? Which oil has the best cleaning properties?

Comments (3)
No. 1-3
Scotty Kilmer
Scotty Kilmer

Editor

it's a great oil, though high priced. But oil should never touch valves, it's the gasoline and additives that touch the valves during combustion. Except on GDI engines where nothing cleans them and they clog up

Funesk
Funesk

2014 Nissan 370z

Techsus
Techsus

depends on vehicle-- what make/model/year/mileage?