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Is this the best motor oil for UDM - Castrol SLX?
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<blockquote data-quote="manjit" data-source="post: 139003" data-attributes="member: 323"><p><strong>1) the base oil used determines the engine oil to be mineral or synthetic, and in synthetic there are PAOs, ester and other base</strong></p><p></p><p>The first question demanding an answer is: *Just what is synthetic oil*?</p><p>Technically speaking, <strong>synthetic lubricants are made by chemically</strong></p><p><strong>combining, in a laboratory, lower-molecular-weight materials to produce</strong></p><p><strong>a finished product with planned and predictable properties</strong>. Don't be</p><p>confused by this technical double-talk. What this means is that</p><p>synthetics are custom-designed products in which each phase of their</p><p>molecular construction is programmed to produce what may be called "the</p><p>ideal lubricant." <strong>This process departs significantly from that of</strong></p><p><strong>petroleum lubricants</strong>, whose physical components, both desirable and</p><p>undesirable, are inherited from the crude oil from which they are</p><p>refined. Crude oil possesses thousands of varieties of contaminants,</p><p>depending upon the oil's geographical and geological origins, which no</p><p>amount of refining can entirely remove. Corrosive acids, paraffins and</p><p>other waxes, heavy metals, asphalt, naphthenes and benzenes, as well as</p><p>countless compounds of sulfur, chlorine, and nitrogen, remain in the</p><p>finished product. Equally as important, petroleum oil molecules, as</p><p>contrasted to uniform-sized synthetic oil molecules, vary significantly</p><p>in size, shape, and length. When your engine heats up, the smaller</p><p>molecules evaporate, while the larger ones tend to oxidize and become</p><p>engine deposits. As a result, refined petroleum lubricating products</p><p>differ widely in their overall quality and performance. <strong>The presence of</strong></p><p><strong>and the resulting drawbacks of the undesirable constituent elements lie</strong></p><p><strong>at the very root of the considerable performance differences between</strong></p><p><strong>synthetic and petroleum-based motor oils.</strong></p><p></p><p><strong> 4) another important feature of an engine oil is its ability to clean and suspend soot, carbon and by-products created in the process of internal combustion until the next OCI... </strong></p><p><strong></strong></p><p><strong>an important factor is the TBN (Total Base Number) level... the ability for the oil to neutralise acid (by-product) created from the internal combustion process.... the higher the TBN level (eq: 10) the better and longer lasting the oil is to withstand the acid attack..... however, the TBN will deplete over time, and once fully depleted, the oil will not be able to neutralise, hence the oil will turn acidic, perhaps sludge and thicken.... affecting the health of the engine </strong></p><p></p><p>TBN Testing is particularly important for engine oil, as it is continuously exposed to acidic combustion products and these must be neutralised before they can corrode engine parts. </p><p></p><p>The TBN of oil is the measure of the alkaline reserve, or the ability of the oil to neutralise acids from combustion. Severe depletion of the TBN results in acid corrosion and fouling within the engine. </p><p></p><p>Maintaining a correct alkaline reserve is critical in preventing unnecessary corrosion of the upper piston, piston rings and top end bearing. Additionally, low TBN is indicative of reduced oil detergency. </p><p></p><p>Low TBN will cause: </p><p></p><p></p><p>Corrosion of combustion space and bearings</p><p></p><p></p><p>Fouling within the engine</p></blockquote><p></p>
[QUOTE="manjit, post: 139003, member: 323"] [b]1) the base oil used determines the engine oil to be mineral or synthetic, and in synthetic there are PAOs, ester and other base[/b] The first question demanding an answer is: *Just what is synthetic oil*? Technically speaking, [b]synthetic lubricants are made by chemically combining, in a laboratory, lower-molecular-weight materials to produce a finished product with planned and predictable properties[/b]. Don't be confused by this technical double-talk. What this means is that synthetics are custom-designed products in which each phase of their molecular construction is programmed to produce what may be called "the ideal lubricant." [b]This process departs significantly from that of petroleum lubricants[/b], whose physical components, both desirable and undesirable, are inherited from the crude oil from which they are refined. Crude oil possesses thousands of varieties of contaminants, depending upon the oil's geographical and geological origins, which no amount of refining can entirely remove. Corrosive acids, paraffins and other waxes, heavy metals, asphalt, naphthenes and benzenes, as well as countless compounds of sulfur, chlorine, and nitrogen, remain in the finished product. Equally as important, petroleum oil molecules, as contrasted to uniform-sized synthetic oil molecules, vary significantly in size, shape, and length. When your engine heats up, the smaller molecules evaporate, while the larger ones tend to oxidize and become engine deposits. As a result, refined petroleum lubricating products differ widely in their overall quality and performance. [b]The presence of and the resulting drawbacks of the undesirable constituent elements lie at the very root of the considerable performance differences between synthetic and petroleum-based motor oils.[/b] [b] 4) another important feature of an engine oil is its ability to clean and suspend soot, carbon and by-products created in the process of internal combustion until the next OCI... an important factor is the TBN (Total Base Number) level... the ability for the oil to neutralise acid (by-product) created from the internal combustion process.... the higher the TBN level (eq: 10) the better and longer lasting the oil is to withstand the acid attack..... however, the TBN will deplete over time, and once fully depleted, the oil will not be able to neutralise, hence the oil will turn acidic, perhaps sludge and thicken.... affecting the health of the engine [/b] TBN Testing is particularly important for engine oil, as it is continuously exposed to acidic combustion products and these must be neutralised before they can corrode engine parts. The TBN of oil is the measure of the alkaline reserve, or the ability of the oil to neutralise acids from combustion. Severe depletion of the TBN results in acid corrosion and fouling within the engine. Maintaining a correct alkaline reserve is critical in preventing unnecessary corrosion of the upper piston, piston rings and top end bearing. Additionally, low TBN is indicative of reduced oil detergency. Low TBN will cause: Corrosion of combustion space and bearings Fouling within the engine [/QUOTE]
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