Once but not any more !!!! One Litre Of Oil Per I000 Miles I Think Thats Very Poor Extended Warrenty On Engines to Take account Of The oil Burners But dont Tell anyone More Re Calls than you would Beleave Made Down to a Price not up to a standard Painfully over complecated Keeping up with the Joanses Mentality ;-[;-[;-[;-[[[[[[[[[[[