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The BMW Range
3 Series
E90, E91, E92, E93
Help on getting an E90
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<blockquote data-quote="astroboy" data-source="post: 360584" data-attributes="member: 4527"><p>Then simple chemistry..</p><p></p><p>We need to continue boiling the engine oil to energize its hydrocarbon molecular chain so its bondage remain loose. Like the Eskimos turning ice into water, stop boiling and it will solidify and turn into ice again.</p><p></p><p>So if engine oil is not boiled enough, it will solidify into sludge. That's why lots of cold start, stop-go traffic, short distance drive or prolong storage without oil change would result in solidification of engine oil to become sludge. Frequent hard driving would prolong the process (buy time) but won't reverse the process, so the only way is to replace the oil at a shorter interval than the recommended 25k km.</p><p></p><p>Now got cow sense? :wink: <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="astroboy, post: 360584, member: 4527"] Then simple chemistry.. We need to continue boiling the engine oil to energize its hydrocarbon molecular chain so its bondage remain loose. Like the Eskimos turning ice into water, stop boiling and it will solidify and turn into ice again. So if engine oil is not boiled enough, it will solidify into sludge. That's why lots of cold start, stop-go traffic, short distance drive or prolong storage without oil change would result in solidification of engine oil to become sludge. Frequent hard driving would prolong the process (buy time) but won't reverse the process, so the only way is to replace the oil at a shorter interval than the recommended 25k km. Now got cow sense? :wink: :D [/QUOTE]
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