my used cars oil was recently changed, now the oil has turned black and it is burning oil?

Answer 1

Modern oils may turn black shortly after you change the oil, so that is usually not a cause for concern. The oil is designed to absorb some of the byproducts of burning fuel, and that darkens the oil.
Usually, a car burns oil because the rings or the valves are allowing oil into the combustion chamber. Conventional wisdom says a couple of simple tests will tell you if the rings or the valves need work. Have someone follow you when you drive. If the exhaust appears blue when you accelerate, that’s the valves. If the blue smoke appears when you decelerate, that’s the rings. Generally, repairing the valves is less expensive than replacing the rings, because you merely remove the heads for valves, but you have to tear the entire engine apart to replace the rings

Answer 2

Going by color is the wrong way of going about it..... doesn't mean the oils worn out or the engines bad.... might want to try a few quick oil changes (every 500 miles or so) to maybe see if it'll start clearing up.... but color is just nothing to go by.

Answer 3

wrong kind of oil some cars only take regular and some car only take synthetic if you have an older car it probably take the regular kind only newer cars can tahe synthetic cuz they run cooler than other cars

Answer 4

you piston rings are probably bad that what happen to my friends car. then his head cracked and antifreeze got into the head and all this crap