Thanks Deano, if that makes everyone happy its awesome.
terrible ted said:
Hey that scale not in US standards so no one going to look at it.
Nothin for nothin Ted, but apparently you and Rick looked at it! :stirpot:
Tough crowd for sure, always getting hung up on the units.
The thing is, if celsius is an issue, it makes the whole viscosity discussion thing more difficult. The Society of Automotive Engineers is responsible for SAEJ300 covering engine oil viscosity requirements. The entire specification is written in metric units, not a Fahrenheit or SUS viscosity unit in sight.
A key parameter is viscosity at 100 Deg C, chosen because it is roughly the operating oil temp of many engines, plus it's the boiling point of water, an easy to reproduce reference point of 212 Deg F.
Read up on how Fahrenheit evolved, its a real British S*** show. One of the key reference points for the original scale was the temperature of the human body, we all know what a stable reference that is. :lol: :lol: :lol:
A keen eye reading this chart will note that viscosity figures use different units at different temperatures (cP and cSt), so they do not directly compare. I didn't make the table, but there are reasons for this.