After specific duration, the chemical gets too hot and reaches a gas
state, rendering it useless for metal parts lubrication purposes.
Instead, the engine is clogged with burned residue commonly referred to
as burnt carbon or engine buildup.
The oil that isn't washed off by other oil sticks to engine parts,
reducing performance. Given chemical technology, synthetic oil has
produced better results and greater product longevity before needing
fluid changes. In some instances, it can last longer than traditional
earth-drawn petroleum-based mineral oils.