I've looked up how to change my cars oil (1997 suburban)    

1.       it looks pretty easy first of all lift your car. Use either jacks or ramps on a flat even surface, place the parking break on and jack your car up

2.        Second heat your car up a bit 2 or 3 minutes idling should be sufficient to get the oil churned up a bit so it will drain more quickly.

3.        Third step is to remove the oil cap. Open the hood and locate the oil cap on top of the engine. This is where you'll ass oil after your done draining the old oil. Doing this will help he oil drain more easily because air can flow in as the crankcase empties.

4.       Find the oil pan. Under your car, look for a flat metal pan closer to the engine than the transmission. It should have a bolt or plug toward the bottom. This is the oil plug you'll need to remove to let the oil drain. Directly under the plug, place your pan and a couple of newspapers for catching the oil

5.       Remove the oil plug. Loosen the plug counter-clockwise using the proper sized socket or crescent wrench if you've got room to maneuver. You should also remove and replace the circular paper (or felt) drain plug gasket, but a metal washer can be re-used if in good condition.               
6
Wait. It wil take several minutes for all the oil to drain out of the car. When the oil has ceasing running out of the crankcase, replace the plug. Hand tighten to make sure you're not cross-threading the oil plug when you screw it back in, and tighten the rest of the way with your wrench. Don't forget to install a replacement gasket or washer.











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