Which is the best product to Lube a motorcycle chain

 Hi all

For the past few years i've heard lots of tips, about how to lube the
motorcycle chain, usually a use those cans of chain lube from the
Castrol, Motorex, Silkolene and others, but i heard that one good
product is Valvoline, the oil which is normally found in cars gear
box, is this true?

thanks

Jaime
Portugal