<human>:  How can I tell if my car needs an oil change?
<bot>: To tell if your car needs an oil change, check your vehicle's owner's manual for the manufacturer's recommendation on when to change the oil. You can also look at the dipstick, if your vehicle has one. The oil should appear light brown or amber in color and should not have a gritty texture. If the oil appears dark or thick, or you notice an unusual smell, then it's time for an oil change.