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→Key Stage 4
==Key Stage 4==
===Meaning===
[[Lubricating Oil]] is a fraction of [[Crude Oil]] which has a [[Carbon]] chain length of around 20-50 [[Carbon]] [[atom]]s.
===About Lubricating Oil===
: [[Lubricating Oil]] is a [[hydrocarbon]] because it is a [[molecule]] made of only [[Hydrogen]] and [[Carbon]] [[atom]]s.
: [[Lubricating Oil]] is used as [[lubrication]] for machines.