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Message: <blockquote data-quote="astroboy" data-source="post: 249237" data-attributes="member: 4527">Yes u can if u are very sure you r still on LifeTime fluid. I want to see 2 things:1. 25k km oil change interval to contribute sludge. So when u collected ur ride, ur engine must be in shinny metal color internally, no sludge and follow the 25k oil change intervals, use Fully Synthetic, no additive and now u have sludge. Can u prove this? and been using original BMW oil filter.2. LifeTime fluid causing problem. U must be sure u r still on LifeTime fluid, no replacement whatsoever and now u have problem. Prove this.I am not talking about isolated case. I want to see statistic of reasonable sampling size.</blockquote>