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The BMW Range
5 Series
F10, F11, F07
Oil change interval
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<blockquote data-quote="astroboy" data-source="post: 638606" data-attributes="member: 4527"><p>It's more towards our lousy quality fuel..</p><p></p><p><a href="http://www.yotarepair.com/sludge%20article.html" target="_blank">http://www.yotarepair.com/sludge article.html</a></p><p></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">------------------------------------------------------------</span></p><p><span style="color: #808080"><strong>Contaminants and Sludge</strong></span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">Contaminants are deadly enemies of an engine. They enter with the air flow and are also generated by the friction of metal against metal. These facts may astound you: for every 100 gallons of gasoline burned in an engine, the following by-products are produced: </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">90 to 120 gallons of water </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">3 to 10 gallons of unburned gasoline </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">1/2 to 3 pounds of soot and carbon </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">1/4 to 1 pound of varnish </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">1 to 4 pounds of sulfuric and nitric acid </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">A measurable percentage of these by-products ends up in the motor oil. Detergents and dispersants in the oil must be able to keep most of these con-taminants neutralized or suspended in the oil as microscopic particles so they don't form sludge, damaging deposits and corrosion. When the waste materials are dispersed properly in the oil, the filter can trap the larger particles. During an oil change, the contaminants too small to be filtered are re-moved with the engine oil. Looks good on paper, right? So much for the perfect world. It's important to note here that good air filters and good oil filters trap more contaminants than lesser quality filters, making the oil's job easier. </span></p><p><span style="color: #808080"></span></p><p><span style="color: #808080">------------------------------------------------------------</span></p><p></p><p>100 U.S. gallons = 378.541 Litres</p><p></p><p>Imagine your FC is 13L/100km, 100 U.S. gallons give you 2,911km. So if 10k km, you'll get 3x the above containment and some will end up in your engine oil.</p><p></p><p>Fabian is right, moisture too.. our air is so moist and will wear the oil additive render it defenseless to sludge.</p></blockquote><p></p>
[QUOTE="astroboy, post: 638606, member: 4527"] It's more towards our lousy quality fuel.. [url]http://www.yotarepair.com/sludge%20article.html[/url] [COLOR="#808080"] ------------------------------------------------------------ [B]Contaminants and Sludge[/B] Contaminants are deadly enemies of an engine. They enter with the air flow and are also generated by the friction of metal against metal. These facts may astound you: for every 100 gallons of gasoline burned in an engine, the following by-products are produced: 90 to 120 gallons of water 3 to 10 gallons of unburned gasoline 1/2 to 3 pounds of soot and carbon 1/4 to 1 pound of varnish 1 to 4 pounds of sulfuric and nitric acid A measurable percentage of these by-products ends up in the motor oil. Detergents and dispersants in the oil must be able to keep most of these con-taminants neutralized or suspended in the oil as microscopic particles so they don't form sludge, damaging deposits and corrosion. When the waste materials are dispersed properly in the oil, the filter can trap the larger particles. During an oil change, the contaminants too small to be filtered are re-moved with the engine oil. Looks good on paper, right? So much for the perfect world. It's important to note here that good air filters and good oil filters trap more contaminants than lesser quality filters, making the oil's job easier. ------------------------------------------------------------[/COLOR] 100 U.S. gallons = 378.541 Litres Imagine your FC is 13L/100km, 100 U.S. gallons give you 2,911km. So if 10k km, you'll get 3x the above containment and some will end up in your engine oil. Fabian is right, moisture too.. our air is so moist and will wear the oil additive render it defenseless to sludge. [/QUOTE]
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