Quote:
Originally posted by hybridsol
1. Controls friction between load-bearing surfaces
2. Reduces wear by preventing metal-to-metal contact between moving parts
3. Limits the temperature by carrying away heat from fluid friction and combustion of fuel
4. Reduces corrosion by coating metal parts and by flushing debris from in between moving parts
(5. Dampers mechanical shock in gears)
6. Forms a seal on the walls of the cylinders
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Ahhh... There are some important ones that I forgot about (and definitely should have remembered)!
- Engine oil has anti-corrosive properties, including buffering to prevent acidity (see also: TBN).
- Oil damps impact/shock at various interfaces (the piston too!).
- Oil closes up the small non-conforming areas between the rings and the cylinder bore, and improves the seal.
Good call!