OK, I'll biteIts fine, look at the boiling point of the stuff.
If it is as high as 4 or higher, use it. the only (functional) difference between 3 and 4 is the boiling point, otherwise it functions the same. as brake fluid.
I use that exact same stuff in my bike, he valvoline DOT 3 & 4. Its labeled as 3 and 4 because you can mix them without problems and it exceeds both specifications.
It has a dry boiling point of 480 degrees which exceeds both 3, and 4.
Its not a mixture of 3 and 4, because they are essentially the same thing. DOT 4 is DOT 3 with an additional compound in it
I have the bottle sitting on my desk right now, would you guys like to know any details off it? lol
5 and 5.1 are silicone based brake fluids.I thought DOT4 fluid was a silicon based liquid?