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Message: <blockquote data-quote="trustgtr" data-source="post: 20599" data-attributes="member: 20189"><p>I have just collected my 04' 525i two days ago, prior to collecting the car i opened the oil cap to see its condition as well as the oil level. I noticed small trace to brown sludge on the cap (not like mix with water,dry) I rejected the car and was given a choice of 4 other units in the lot..however after checking the others, i found that all the units are the same and showed this brown stuff around the cap. I was told that my unit has been serviced and was given assurance that if any issues were to develop it would be covered under the 3 months warranty. Is this normal for the m54 engine? considering it has a long 25k km service intervals. i plan to change my oil again in a month to mobil 1 as had good experience with its cleaning abilities. Any advice would be greatly appreciated..</p></blockquote><p></p>