Its not that scientific. Triumph said to us the same as engine
oil. This back when there was a very different oil for winter
and summer. I use 30W in summer and 20W When it gets colder.
The 20W can be gotten as 3-in-one motor oil in the blue and white
can. Straight 30W is available at the hardware store for lawn
You fill SUs to the line just below the top oil in the bell where
the damper plunger goes.
62 TR4 CT16260L - Groton, MA
My TR4 Restoration Web Site
[mailto:firstname.lastname@example.org]On Behalf Of sujit roy
Sent: Friday, June 30, 2000 6:02 PM
Subject: dashpot oil
My Stag ROM mentions to use 10-40W engine oil in the dash pots.
Some people use general purpose lubricating oil in them instead.
I suppose the thicker the oil, more damping is introduced.
What pros and cons have people come across in using either type?
Also how mush oil should I use in the dashpots?