Amsoil. I use it in everything, including my generator.
I dabbled with the Valvoline Restore and Protect to see for myself what it was all about since I always used Valvoline prior to Amsoil and ultimately I have been under impressed overall. It helped with a small amount of oil use on one vehicle I had, but I never saw it clean varnish like so many others report. So I have moved on and back to Amsoil exclusively. I think I always knew that using the Restore and Protect wouldn’t be a long term thing for me.
I dabbled with the Valvoline Restore and Protect to see for myself what it was all about since I always used Valvoline prior to Amsoil and ultimately I have been under impressed overall. It helped with a small amount of oil use on one vehicle I had, but I never saw it clean varnish like so many others report. So I have moved on and back to Amsoil exclusively. I think I always knew that using the Restore and Protect wouldn’t be a long term thing for me.