You’re only seeing the surface.

Our most active car forums and technical guides are reserved for registered users.

Sign up here to get total access and start sharing your own ride.

What is pentosin?

The go-to spot for all non-technical car talk. Whether you’re discussing the latest EV tech or classic steel, park up and join the conversation.
Post Reply
GURU4U2BUY
Posts: 48
Joined: Mon Feb 02, 2026 8:40 pm

Will pentosin lose its efficacy as we get older? I was wondering if there was any use for a partially used tin that I discovered in my garage. I would say it's around three years old. Appreciative of input.
Top
nub1ru
Posts: 36
Joined: Mon Feb 02, 2026 8:13 pm

After three years in an unsealed container, pentosin CHF 11S will have oxidised or absorbed moisture. I would throw it out if it were brake fluid, but I'm not sure if it's hydraulic fluid or not, so I'd definitely throw it out if it was both, haha.
Top
GURU4U2BUY
Posts: 48
Joined: Mon Feb 02, 2026 8:40 pm

OK Thank you. The item will be discarded.
Top
maturo99
Posts: 49
Joined: Mon Feb 02, 2026 8:35 pm

Could CHF11 be okay as it is water-based? I'm not sure, but it does seem watery.
Top
Post Reply

Return to “General Motoring”