The JAX cap is pressed in tight under the rim, and no amount of pushing lifts it out. Knock, turn, and it comes off clean. A 33 second video shows how.

Pressing the cap straight down only seats it harder. The Castrol cap shears sideways, then peels back. A 36 second video and four steps show how.

For over 60 years, Castrol has worked alongside the space industry, delivering lubricants for critical components in some of the most demanding environments imaginable.