Rob - My oil probably had about 3500 on it when I last changed it and it was a good deal darker than the new Mobil 1 I put in ? I do mine myself so I am aware of how dirty it is coming out.
That said what is the ESP Formula?
texas t I have searched high and low at Walmart for 0 40 and none around here have it. I think I paid 6.59 at Autozone a few months ago when I changed mine.
Pat