see posts on
www.volvo-480-europe.org re possible alternative oils which are compatible with phosphor bronze parts used in volvo evolutions of the renault boxes (renault units dont have upgraded parts on most boxes). volvo specific upgrades. millers maybe a replacement (make oils for classic cars which used phosphur bronze parts as standard. These are not compatible with sulphur based anti wear additives). Best thing is to use volvo oil but millers maybe nearest most suitable.