Ako, I use Caltex Siver and from time-to-time ( one year, 2years) I use their power cleaner additive for gasoline engine.

I am hesistant to mix from different manufacturers, it may decrease the efficiency para dun sa gusto mo ma-attain, meron sila kanya-kanya diskarte for blending which is not as simple as mixing sugar with coffee. They do it within a well-controlled guidelines.