Originally Posted By: Falcon_LS
Assuming a vehicle isn't equipped with a strict emission control system (i.e. no catalytic converter, etc.), would an API SL oil be a better choice?
IF your car truck has none of that OR your not worried because
your car doesn't use oil yea one can use it,SL has higher amounts
of Zinc,calcium,phos so in theory it will provide better wear control.
But newer cars of today have roller valve trains so a SL isn't as needed so bad.