Theoretically, on paper, if the the spec is right then yes
"Halfords Synthetic Oil 5L is formulated to the same protection and performance standards as the leading brands. For maximium engine protection under extreme loading or enthusiastic driving. Also useful for use in the latest turbo diesel engines. Meets the specification of Mercedes 229.3, VW502.00/505.00, Porsche, BMW Longlife.
Features and Benefits:-
Oil viscosity 5W/40
API SL CF
ACEA A3 B3 B4
Formulated to the same protection and performance standards as the leading brands"
In reality, its Halfords
Go with some Millers XFS 5w40, don't cost a whole lot more, but its a name that the motorsport world trust.