not quite sure what the mystery is. tne is test no ester, has a half life of about 6 hours once tthe test gets into your blood stream.
using an oil base effectively extends the release rate, which is one reason to use oil over water. also water can be more painfull but really it comes down to how its made.
i have used tne for many years and preffer it to any type of ester. if you are consistant with your injects you will achieve more stable blood levels and essentially get by with a little less.
esters take up wieght so anytime there is an ester you are not getting the full dose of t. just look up ester wieghts, i know there is a thread around on it.
i would not consider it a pre work out drug. i wouldnt really consider suspension a preworkout drug either as you would need to figure a 3-6 hour window fro an assumed peak. but then again all you are realy after in this case is nerve excition, you can look into nasal androstendione like the germans used however many years ago which would prob be a more efective nerve agent. but blah blah blah.
its a great drug, my favorite test. if its made right it doesnt really hurt, the key is correct solvation. if thats a word.
also if one were to believe in any possibility of site enhancement esterless gear may be the best bet as it may have some possible effect on local receptors as it is available as is and does not have to have the ester desolved. not saying it does, but some theorize...
hope that clears up the mystery