Hey. I recently changed my leaking Intercooler on my 2018 rxpx and just found my oil to be milky. I’m planning on flushing the oil a couple of times to hopefully get all of the watery oil out. Any suggestions on what oil to use for the intermediate oil flushes. Not trying to throw away $80 worth of brand new XPS oil 4-5 times but I’m also not sure if the type of intermediate oil matters if I’m going to fill it with XPS when I’m done. Can I just use the cheapest 5w40 oil I can find?