Among the liquids you mentioned—water, oil, nail polish remover (typically containing acetone), and methylated spirits (which often contains ethanol and methanol)—the one with the highest boiling point is generally oil.
To provide some context:
- Water has a boiling point of 100°C (212°F) at standard atmospheric pressure.
- Oil (specifically vegetable oils) varies, but many common cooking oils have boiling points around 180-230°C (356-446°F).
- Nail polish remover (acetone) has a boiling point of around 56°C (132.8°F).
- Methylated spirits (denatured alcohol) generally have boiling points ranging from about 60-78°C (140-172°F) depending on the composition.
Given these boiling points, oil typically has the highest boiling point among the options listed.