Hi I've just changed the oil on my 1.6 09 petrol Focus with 5w30 a1 magnatec. The oil that came out was black as per usual and I had to leave it draining overnight because the light faded on me before I could finish it. When I filled it back up this morning the dipstick is showing the oil to be a bit milky. Could this be because I used oil I'd opened 6 months ago or a bit of moisture has got into the sump while the plug was off overnight? Does this sound more like condensation than anything else? I haven't had chance to give it a long run yet.
Thanks
Thanks