Where is the oil filter on a 2002 saturn sl2 twin cam engine

SOURCE: Saturn SL2 1.9

The oil filter is most easy to get from under the vehicle. If you have a jack, lift the front passenger side of the car enough to crawl behind the front passenger tire. The oil filter will be on the back of the engine right above the drive axle.

ATTN: The oil filter can be easily mistaked for the transmission filter which is located on the front of the engine on the drivers side.

I am unsure the the exact specification of oil capacity. You can find it in the owners manual or ask the guy at the auto parts store they can look it up. I would put in 3.5,start it let it run for ten seconds then shut it off and check the oil level and add if needed. It wont take more than 4.5

SOURCE: 94 Saturn Twin Cam Valve Adjustment

Valve slash and clearance adjustments should only be performed by certified mechanics and is not a job for the garage or novice hands on type.
If you still decide to proceed, I suggest you get your hands on a maintenance manual which will list the procedure step by step, including proper torque values.

SOURCE: 95 saturn sl2 smokes is it the valve seals ?

your pistons are leting blow by get through whick means that your pisten rings are wearing out more then likly

SOURCE: Where is the fuel filter on a 1997 Saturn SL2?

It is an inline fuel filter under the car in the frame rail up front neat the motor area. It will look similar to this...



On that saturn it has a hose already attached to the fuel filter. It has what they call quick connects on both sides. just remove one side of air intake. (the one closest to firewall of car) where you can get your arm in there. Reach right under fuel filter and grab two white or green tabs with pointer finger and thumb. and squeeze till they make a snaping noice. then all you have to do is reach under fuel filter and pull hose off. Then push the black clips around fuel filter out and it should slide out. The same on the hose already connected to the fuel filter

SOURCE: My 93 Saturn SL2 intermittent stalling issues

I would look at the egr system. First pull the valve and clean it. If you have a vacuum tester this would be a good time to test the valve itself as well. When under load you should be able to see the diaphragm engage and hold and then release as you release the vacuum. If that doesn't work check and/or replace the egr solenoid. It's located on the driver's side of the valve cover and usually runs about 60$.

Yours is a common complaint and the above is the most common remedy. Outside of that you might want to check and clean the idle air control valve and the port where it's housed. If it is extremely dirty or something managed to get stuck in there that could affect you vehicle running at idle as well.

Another thing, even though you just changed the plugs, pull one back out and look at it. If is fouled with oil you might need a new valve cover gasket which if it's leaking badly enough will impede spark.