Advertisement: When your car's engine is running at its normal operating temperature, any major brand of motor oil will protect it about as well as Tuff does  When the engine is cold, it is a different story: Tuff motor oil flows better at lower temperatures than its major competitors do
So, if you want your car's engine to have maximum protection, you should use Tuff
Tuff motor oil's share of the engine oil market peaked three years ago.