09-10-2012, 13:12 PM
Mulle tundub, et õlide osas on jätkuvalt üleval pseudtõde, et kui mingi õli on poolsünt või täissünt, on ta kohe automaatselt vedelam. Ei, see sõltub konkreetse õli viskoossusest. Põhimõtteliselt saab olemas olla ka 30W monoviskoosne sünteetiline õli. Ei pea tingimata selleks mineraal olema.
Küsimus on selles, et sünteetilised ja poolsünteetilised õlid taluvad ekstreemseid tingimusi paremini ja on pikema elueaga. Samas: nad on ka kallimad.
"Synthetic oil is used as a substitute for lubricant refined from petroleum when operating in extremes of temperature, because, in general, it provides superior mechanical and chemical properties than those found in traditional mineral oils."
Sünteetilise eelised ja miinused:
Measurably better low- and high-temperature viscosity performance at service temperature extremes
Better chemical & shear stability
Decreased evaporative loss
Resistance to oxidation, thermal breakdown, and oil sludge problems
Extended drain intervals with the environmental benefit of less oil waste.
Improved fuel economy in certain engine configurations.
Better lubrication during extreme cold weather starts
Longer engine life
Superior protection against "ash" and other deposit formation in engine hot spots (in particular in turbochargers and superchargers) for less oil burnoff and reduced chances of damaging oil passageway clogging.
Increased horsepower and torque due to less initial drag on engine
Does not contain detergents
Miinused:
Potential decomposition problems in certain chemical environments (predominantly in industrial use.)
Potential stress cracking of plastic components made of polyoxymethylene (POM) in the presence of polyalphaolefin (PAO).
In July 1996, Consumer Reports published the results of a two-year motor oil test involving a fleet of 75 New York taxi cabs and found no noticeable advantage of synthetic oil over regular mineral oil. In their article, they noted that "Big-city cabs don't see many cold start-ups or long periods of high-speed driving in extreme heat. But our test results relate to the most common type of severe service - stop-and-go city driving." According to their study, synthetic oil is "worth considering for extreme driving conditions: high ambient temperatures and high engine load, or very cold temperatures." [17]
Because rotary engines inject small quantities of motor oil into the combustion chamber to lubricate the apex seals, and burned synthetic oil causes gummy deposits on the apex seals, synthetic oils are not recommended in automotive rotary engines.[18]
Seega, väita, et vene mootor annab saba, kui talle sünteetiline õli sisse panna, on minu arust väär. Seal peavad olema mingid muud probleemid ees.
Omaette teema on muidugi see, kas sünteetilist õli on otstarbekas kasutada mingites kohtades. Peamiselt on selle taga majanduslik kalkulatsioon. Osta xx liitrit sünteetilist õli jah xx kogus vene õli omab rahalises ekvivalendis suurt vahet.
Samas: uuele Valtrale keegi vaevalt Kamazi õli sisse valama hakkab, see käib ikka tootja soovituste ja ettekirjutuste kohaselt.
Meie keskkonnas taandub aga see muidugi ülse algteemani, et kas mootoril õli üldse vahetatakse ja millega vahetatakse. Hea üldse, kui mõne liikuri omanik teab varda 710 asukohta. Sellisel puhul on diskussioon õlide kui selliste kohta üldse mõttetu.
Küsimus on selles, et sünteetilised ja poolsünteetilised õlid taluvad ekstreemseid tingimusi paremini ja on pikema elueaga. Samas: nad on ka kallimad.
"Synthetic oil is used as a substitute for lubricant refined from petroleum when operating in extremes of temperature, because, in general, it provides superior mechanical and chemical properties than those found in traditional mineral oils."
Sünteetilise eelised ja miinused:
Measurably better low- and high-temperature viscosity performance at service temperature extremes
Better chemical & shear stability
Decreased evaporative loss
Resistance to oxidation, thermal breakdown, and oil sludge problems
Extended drain intervals with the environmental benefit of less oil waste.
Improved fuel economy in certain engine configurations.
Better lubrication during extreme cold weather starts
Longer engine life
Superior protection against "ash" and other deposit formation in engine hot spots (in particular in turbochargers and superchargers) for less oil burnoff and reduced chances of damaging oil passageway clogging.
Increased horsepower and torque due to less initial drag on engine
Does not contain detergents
Miinused:
Potential decomposition problems in certain chemical environments (predominantly in industrial use.)
Potential stress cracking of plastic components made of polyoxymethylene (POM) in the presence of polyalphaolefin (PAO).
In July 1996, Consumer Reports published the results of a two-year motor oil test involving a fleet of 75 New York taxi cabs and found no noticeable advantage of synthetic oil over regular mineral oil. In their article, they noted that "Big-city cabs don't see many cold start-ups or long periods of high-speed driving in extreme heat. But our test results relate to the most common type of severe service - stop-and-go city driving." According to their study, synthetic oil is "worth considering for extreme driving conditions: high ambient temperatures and high engine load, or very cold temperatures." [17]
Because rotary engines inject small quantities of motor oil into the combustion chamber to lubricate the apex seals, and burned synthetic oil causes gummy deposits on the apex seals, synthetic oils are not recommended in automotive rotary engines.[18]
Seega, väita, et vene mootor annab saba, kui talle sünteetiline õli sisse panna, on minu arust väär. Seal peavad olema mingid muud probleemid ees.
Omaette teema on muidugi see, kas sünteetilist õli on otstarbekas kasutada mingites kohtades. Peamiselt on selle taga majanduslik kalkulatsioon. Osta xx liitrit sünteetilist õli jah xx kogus vene õli omab rahalises ekvivalendis suurt vahet.
Samas: uuele Valtrale keegi vaevalt Kamazi õli sisse valama hakkab, see käib ikka tootja soovituste ja ettekirjutuste kohaselt.
Meie keskkonnas taandub aga see muidugi ülse algteemani, et kas mootoril õli üldse vahetatakse ja millega vahetatakse. Hea üldse, kui mõne liikuri omanik teab varda 710 asukohta. Sellisel puhul on diskussioon õlide kui selliste kohta üldse mõttetu.
Life\'s journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting \"Holy s--t!....What a ride!