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The BMW Range
3 Series
E90, E91, E92, E93
Anyone using Castrol Edge Sport 0w40
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<blockquote data-quote="Schwepps" data-source="post: 345578" data-attributes="member: 3592"><p>Hmmm maybe, but the causes of sludge are universal:</p><p>1. Short trips resulting in oil operating below optimum temp and poor circulation</p><p>2. Low revs all the time resulting in lack of oil circulation in the top end</p><p>3. Using mineral or semi-synth oils which start breaking down from the word go</p><p>4. Old coolant topped-up with tap water which becomes an acidic electrolyte</p><p>5. Inefficient air filter which lets dust and water particles into the engine</p><p></p><p>No disrespect meant, but women drivers are often guilty of the first two. High performance engines are more susceptible than family car engines because of their design. It can also be argued that all this long-life 25,000km service interval advertising is good for marketing but increases sludge risk.</p><p></p><p>All the causes are preventable with regular maintenance and revving up our BMWs as they were designed for. These are proud sports saloons, not marketing trip run-abouts. :wink:</p></blockquote><p></p>
[QUOTE="Schwepps, post: 345578, member: 3592"] Hmmm maybe, but the causes of sludge are universal: 1. Short trips resulting in oil operating below optimum temp and poor circulation 2. Low revs all the time resulting in lack of oil circulation in the top end 3. Using mineral or semi-synth oils which start breaking down from the word go 4. Old coolant topped-up with tap water which becomes an acidic electrolyte 5. Inefficient air filter which lets dust and water particles into the engine No disrespect meant, but women drivers are often guilty of the first two. High performance engines are more susceptible than family car engines because of their design. It can also be argued that all this long-life 25,000km service interval advertising is good for marketing but increases sludge risk. All the causes are preventable with regular maintenance and revving up our BMWs as they were designed for. These are proud sports saloons, not marketing trip run-abouts. :wink: [/QUOTE]
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