Special grade air filter oil. Works really well for onroad and offroad. Very sticky type of oil, but the airflow through the filter remains very good. Very specific bright neon yellow color. Due to the color its very easy to see if the foam -filter has enough oil everywhere. Visible both on white and black filter-foams.
Can be rinsed / washed easily with water.
Strong clear bottle with easy cap.
[source: www.xceedrc.com]
