Dash Pot Oil

[Bill & Skip Pugh <anabil@caltel.com>]

Is there a definitive formula for the AMOUNT of dash pot oil needed? 
My references refer to 1/2 inch above this or 1/2 inch below that, or 
" when resistance is felt and there is 1/4 inch below the 
threads",etc.,etc.,. On my 1957 TR3 for instance 1 3/4inch SUs  (HD)? 
would that be 1/4 ounce fluif measure, 10 Mililiters, or what...?
Any ideas, sage experience, WAGs accepted.

-- 
Bill Pugh
aka Wily
1957 TR-3
aka Casper
TS16765L