cunning plan
Well-known member
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- Jul 15, 2008
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- Northamptonshire
- Year of Your Van(s)
- 1968
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- Clipper / Microbus
As oil is specified / categorised with grades, including 'Winter' grades (the small 'w') and these oil grades are measured in viscosity with 0 being the 'thinnest' and the higher the number, the thicker it is, why does warming your engine make an oil change easier because the oil is hot and thinner?
To clarify what I mean, let us look at a 5w 30 specified oil:
That specification shows us that the oil will act like a 5 grade in winter (w), but a 30 grade when the oil has reached temperature (100 degrees C I believe).
On that basis, the oil is thinner cold than it is hot (as 5 is lower than 30)... However we know it is the other way around, oil is thinner when hot, so it should be 30w 5, but it isn't...
There is some lunchtime thinking for you... :rofl:
opcorn:
To clarify what I mean, let us look at a 5w 30 specified oil:
That specification shows us that the oil will act like a 5 grade in winter (w), but a 30 grade when the oil has reached temperature (100 degrees C I believe).
On that basis, the oil is thinner cold than it is hot (as 5 is lower than 30)... However we know it is the other way around, oil is thinner when hot, so it should be 30w 5, but it isn't...
There is some lunchtime thinking for you... :rofl:
opcorn: