Half of the new enanthates I have taken caused pip for the first few injections and then stopped. Multiple sources. Some of th best even. First time taking mast e, first test e with a new source, first tren E with old source and new source. SubQ was always more likely. 3rd injection was minimal, 4th all pip gone. I can't promise the same for you, but my body seems to take a minute with new oils.
I now do 3 a week with slin pins with anything new, and it never happens anymore as long as it's IM where I'm leaner.