Question

Question #30da6

Answer 1

Here's a table of densities of the various grades at 20 °C.

Explanation:

`color(white)(m)"SAE"color(white)(mm)"Density/kg·m"^"-3"`
`stackrel(—————————color(white)(ll))("15W-40"color(white)(mmmm)879)`
`color(white)(l)50color(white)(mmmmmmll)875`
`color(white)(l)40color(white)(mmmmmmll)872`
`color(white)(l)30color(white)(mmmmmmll)869`
`color(white)(l)"20W" color(white)(mmmmmll)865`
`color(white)(l)"10W-40"color(white)(mmmm)863`
`color(white)(l)20color(white)(mmmmmmll)861`
`color(white)(l)"10W"color(white)(mmmmmll)857`
`color(white)(l)"5W-40"color(white)(mmmmll)854`
`color(white)(l)"10W-60"color(white)(mmmm)850`

The densities don’t change very much with SAE Grade.

It's the viscosities that change.