So is it also worth is to put dot 4 or 5 in your ink? Because Dot 3 isnt made some Euro countries anymore, they did tell me that dot 4 was a mixture of dot 3 and 4...sometinhg like that
Edit: I found this on wikipedia, maybe usefull:
"DOT 4, like DOT 3 and DOT 5.1, is a polyethylene glycol-based fluid (contrasted with DOT 5 which is silicone-based)"