b'Why arePourquoi les basessynthetic bases better? synthtiques sont meilleures ?11Synthetic bases molecules: Les molcules de base synthtique : are regular and uniform, Mineral Minralesont rgulires et uniformes, form a more consistentforment un film plus homogne,and resistant film, plus rsistant,have a smaller size whichleur petite taille les rendentallow them to move easier Synthetic Synthtique plus mobiles, plus efficaces.and be more efficient.Synthetic bases properties Proprits des bases synthtiquesSuperior thickness of the lubri-Better protection against Epaisseur de film suprieureMeilleure protection contre lusure cating film (high T viscosity) wear (bearings, piston segments,(visco haute T) (paliers, segments de pistons, valve gear) commande de soupape)Do not contain unstableBetter stability against oxidationNe contiennent pas deMeilleure stabilitloxydationcomponents and temperature composants instables et thermiqueRequire less viscosity indexBetter stability against shearing Ncessitent moins dadditifsStabilit au cisaillement optimiseimprover additives optimiseurs dindice de viscositLow volatility (PAO) and lowLess oil consumption Faible volatilit (PAO) et Consommation dhuile infrieureevaporation tendency faible perte par vaporationVery good performance Optimized cold start and Trs bon comportement Dmarragefroid optimisat low temperature quick lubrication of the enginebasse temprature et huilage rapide des moteurs= less wear = moins dusureLow viscosity oils Les huilesfaible viscositAbaissement de la consommation(particularly 0w and 5w) Reduction of fuel consumption(surtout 0w et 5w) entranent de carburant sans consommation imply a much reduced without increasing oil consumption un frottement nettement dhuile suprieurefriction in the engine plus faible dans le moteurBetter resistance againstBetter engine cleanliness andRsistance thermiqueMeilleure propret des moteurs et temperature and therefore,extended oil drain intervals. suprieure, do rduction desintervalles de vidange allongs.reduction of dust deposits dpts de poussiresWhy is it necessary to addPourquoi doit-on ajouter desadditives to base oils? additifs aux huiles de base ?The OEM (Original Equipment Manufacturer)Les cahiers des charges des Constructeurs concernantspecification charts on engines are every yearles moteurs sont, chaque anne, de plus en plusmore and more demanding in terms of performance,exigeants en terme de performances, dconomieenergy saving, metal protection and reliability. dnergie, de protection des mtaux et de fiabilit.TheADDITIVE cocktail , BARDAHLs know-howLeCOCKTAIL dADDITIFS , savoir faire de BARDAHLsince 1939, blended with base oils, enables to ensuredepuis 1939, mlang aux huiles de base, permet dassurerthe good functioning of mechanical partsle bon fonctionnement des pices mcaniques et de passerand comply with OEM specifications. les exigences OEM.These additives are: Ces additifs sont : Viscosity additives, IV (Index Viscosity) improvers, Les additifs de viscosit, optimisateurs de VI (Indice de which enable to raise the pour point andviscosit), optimisateurs de point dcoulement, permettent improve significantly the properties of base oils. damliorer considrablement les caractristiques des bases. Anti-foam and anti-ageing performance additives,Les additifs de performances, de protection contre lewhich protect the oil. vieillissement, anti-mousse, protgent lhuile. Detergent and dispersing performance additives,Les additifs de performances, dtergents et dispersants,which protect mechanical parts. protgent les surfaces mcaniques. Extreme pressure (EP) and anti-wear (AW) performance Les additifs de performances, EP (Extreme Pressure), AW additives, which strengthen the lubricating microfilm. (Anti Wear), renforcent la micro-couche de film lubrifiant. Anti-corrosion polar additives, which neutralize acids.Les additifs polaires anticorrosion neutralisent les acides. Friction modifier additives, which can be found in the Les modificateurs de coefficient de friction, autre micro-filmFuel economyoils. They form another but moreplus fragile constitu de molcules charges lectriquement, breakable microfilm made of electrically loaded molecules. sont prsents dans les huilesFuel economy .'