Ok I have a 99 taurus sho, 125k on it. I am using Royal Purple in it and I intend to get my 10k as claimed by RP since it was stinken 7.50 quart. Anyway, I am at about 6500k on the oil changed the filter at 5k, The oil has a slight gas odor. Still has viscosity and all but it's dark dark brown. Should I be worried? I would also like to note that I blew a water hose and the engine overheated extremley bad one time for a short period. Enough to cause detonation very bad, I quickly stoped and shut it off though. What is the temp that moly could come out of suspension? I only ask cause I am noticing for the first time I use a very slight amount of oil and hope moly ain't causing premature wear. I can't afford a UA.