Not trying to be inflammatory (I think I had a similar stance to yourself at one point) but… how does that make it not vegan friendly? Cooking in the same oil does not contribute to animal exploitation and at this stage I would think neither promotes nor normalises the exploitation of animals. Veganism is not about personal purity. It is not like kosher or halal or anything like that. Is it possible that your standard is doing more harm than good? It is neither possible not practicable to avoid animal products entirely even for a committed vegan such as myself. I hope this does not come off rude. All the best to you :-)