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Message: <blockquote data-quote="t2ribena" data-source="post: 306039" data-attributes="member: 3847">mangkor...one question? you mentioned that the engine block is made entirely of magnesium and does this includes the cylinder sleeve as well?i don't think any manufacturer has come up with 100% magnesium crankcase/engine block yet which in this case has a magnesium cylinder sleeve since magnesium does not have a good thermal conductivity properties thus not suitable for this application...since you mentioned the issue with M52 engines, IMHO this was a different issue than the missing oil issue in N52 engines...in the M52 engines BMW had adopted the high tech Nikasil cylinder head liners that has a weak point that it is very sensitive to high sulfur content fuel...over time the liners got corroded and causes blowbys which causes loss of power and engine oil consumption at higher rate than normal...on the N52's engine BMW uses the Alusil aluminium + silicon alloy to address this issue due to sulfur corrosion...</blockquote>