Too vague? You want to know "how"? It's generally the safe for most vehicles. You want to get the car on a lift, and not use jack stands....as the old oil will "pool" and not completely drain out.
But there's a drain plug under the front of the car that you unscrew, make sure you got a pan underneath to catch it....
Let it drain, then add some oil first, to let the "new" oil drain out the rest of the old stuff, incase it didn't all come out. Then tighten the drain plug underneath and proceed to add your 3.5-4 qts of oil.
I know it's extremely vague, you might check wikihow.com - they got a good howto there
What engine oil is recommended for kia Rio 2007
10w30
3.5 quarts of oil
FRAM PH9688
it takes 3 and a half quarts
every 3 - 4,000 miles
The oil capacity of the 2003 Kia Rio engine is 3.6 Quarts.
a kia Rio 04 takes approx 3.3 litres if you are changing oil and filter.
The oil stick on a 2001 Kia Rio is located on the top of the engine. The oil stick allows a person the ability to check the oil levels on their vehicle.
The recommended oil for a 2001 Kia Rio is SAE 10 W 40. The car holds approximately 5 quarts of oil.
THE OIL FILTER ON MY 2003 KIA RIO IS LOCATED ON THE BACK SIDE OF THE ENGINE JUST OFF TO THE PASSENGER SIDE...
There's really no rule. check your owner's manual. I think in my (07 Kia Rio) it's every 6000 miles (every other oil change).