LeX
2 fire 2 paie vezi k te iau la bataie
Data inscrierii: 02/Mar/2009
Mesaje: 123
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 Trimis: 02/03/2009 14:58 Titlul subiectului: Radiatorul de ulei |
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In inițialul rand cateva informatii despre ulei.
"...this makes multigrades an easy and popular year-round choice for drivers who experience hot summers and harsh winters. Multigrades are easily recognized by the dual viscosity rating (i.e. 10W-30 where the 10W is the low temperature or winter designation and the 30 is the high temperature designation). It is the motor oil viscosity modifier additive that produces a thickening effect at high temperatures but is dormant at low temperatures. "
"Among the many performance advantages that synthetic oils offer is their ability to remain stable at high temperatures (under which conventional oils begin to break down) and remain fluid at low temperatures (under which conventional oils begin to thicken). This provides optimum lubrication at extreme temperatures, reducing wear for a cleaner, more efficient engine. "
Deci ca sa inteleaga toata lumea. Majoritatea uleiurilor gasite astazi sunt multigrad care se comporta diferit la temperaturi scazute fata de temperaturi ridicate. De exemplu, in cazul 10W-40, 10W este vascozitatea la temp. joase iar 40 la temperaturi ridicate. Uleiurile multigrad contin un aditiv ce modifica vascozitatea care realizează un urmare de ingrosare la temperaturi ridicate dar "hiberneaza" la temperaturi mai scazute.
Al doilea paragraf spune ca printre avantajele uleiului sintetic una din ele este aceea ca ramane stabil la temperaturi inalte si ramane fluid la temperaturi coborate. Acest lucru produce lubrefierea la temperaturi extreme reducand uzura..." |
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