- Detta ämne har 4 svar, 1,033 deltagare, och uppdaterades senast för 21 år, 5 månader sedan av
David.
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Inlägg
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David
Hej har precis vart o köpt lite olja till bilen där ja köpte hade dom bara Motul 300V Factory line SAE 5W40 hel syntet.. Har läst på forumet att många kör med Motul competition 10W40 vad är det för skillnad?
fick iaf ge 145kr/l tycker ja va helt ok pris..//D
Niklas
The proper viscosity is the single most important criteria of a lubricating oil. The basic performance of machinery is based on the viscosity of the lubricant. Viscosity is, if you like, the resistance to the flowability of the oil. The thicker an oil, the higher its viscosity. The chart on the right shows a rough guide to ambient temperatures vs oil viscosity performance in both multigrade (top half) and single grade (lower half) oils.
Multigrade oils work by having a polymer added to a light base oil which prevents the oil from thinning too much as it warms up. At low temperatures, the polymers are coiled up and allow the oil to flow as it’s low number (W number) indicates. As the oil heats up, the polymers unwind into long chains which prevent the oil from thinning as much as it normally would. The result is that at 100°C, the oil has thinned only as much as it’s higher rating. Think of it like this: a 10W30 oil is a 10-weight oil that will not thin more than a 30-weight oil when it gets hot.
The viscosity index of a lubricant is an empirical formula that allows the change in viscosity in the presence of heat to be calculated. This tells the user how much the oil will thin when it is subjected to heat. The higher the viscosity index, the less an oil will thin at a specified temperature. Multi-viscosity motor oils will have a viscosity index well over 100, while single viscosity motor oils and most industrial oils will have a VI of about 100 or less.
http://www.chris-longhurst.com/carbibles/images/saerates.gif(Taget från: http://www.chris-longhurst.com/carbibles/index.html?menu.html&engineoil_bible.html)
Läs mer här:
http://bbs.impreza.nu/dc/dcboard.php?az=show_topic&forum=5&topic_id=3551&mesg_id=3551&listing_type=searchsom jag förstod det så var det ingen bra olja till sommarn allså 🙁 får åka tillbaxs o se om dom kan ta hem 15W50 ..
/D
Jag kör på 15W50, räcker med 10W50 var det någon som sa. Du kan ju alltid spara den oljan du köpt och hälla i bilen till vintern. Det är väl inget bästföredatum på olja?
nej iof men det börjar bli lite kärvt i kassan 🙁
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