1996 Audi A4 Quattro 2.8 V6 12 valver with ca 143k miles on the clock. I've begun to wonder whether or not to dump my current fill of M1 5W-40 prematurely at about 5k miles. It appears that my regular doses of LC20 have lead to some type of cleaning process that is darkening the oil more than I've ever encountered. Last time I went 8k miles with M1 5W-40, but then I didn't use LC20. The UOA was good. I'll have a UOA of the current fill done either way, but would like to hear what you fellas think. Should I run this oil despite its looks to 8k miles, or should I dump it preemptively and prematurely? My next fill will be RL 5W-40.