Does your oil seen to get darker after ~1000miles? Like from the normal amber color to a dark brown? I've run M1 10w30 80%-90% of the time on my past 2 cars and I always noticed it would start to get darker after I put 1000-1200 miles on the oil. My father also runs the same oil in his truck and he noticed the same thing so I always assumed it was normal. The blend was always 10w30 TriSyn or whatever formula they ran before that. Now at my last oil change I went with some M1 SS 10w30 and ~950mi later it still amber colored. It looks like I just poured it out of the bottle? Basically my question is what causes the oil to darken and why am it not seeing it anymore with the SuperSyn? Thanks!