Its not the oils. Its not the BA nor is it the BB. Any type of test can cause this reaction. Its the esters. Enan, prop, cyp. and the test itself. These are large molecules that you are injecting into your body for the first time. These esters are made to be strong so that they release the test slowly.
I inject test prop ED. Sometimes its fine, other time it hurts like a bitch for days.
You have to figure out the sweet spots on you body that react the least.
Also, if you do what I said and add oil to your syring it will help tremendously.
Another trick is to heat up your vials and then draw. This thins out the solution and it spreads out more evenly in the muscle.
If you can't get past test enan and now you are going to use slin then you are going to run into trouble.
You asked for advice on this thread but you didn't even respond to what I told you. I know what I'm talking about, but don't listen to me. Inject your slin and when your blood sugar sky rockets till your heart feels like its gonna explode then don't come on hear crying for help.