I can't get the oil cap off to add more oil. I don't have an owner's manual.

Your owners manual explains how to add coolant, if you don't have one go to the factory owner assistance web site for your region and download one it is free.

Should be on the oil filler cap

Could always stop by a dealer & ask
all your questions to the service mgr

Walk in service bay from outside like
you own the place

20 w - 50 motor oil is a pretty heavy weight of a motor oil, normally engines either perform better on 5 w- 30, or 10 w - 30, if you have a owners manual , you can check in it to see what the manufacturer calls for , if you don't have a manual, then look on the oil cap, where you pour the oil into, it should have the information on the cap. there is even motor oils on the market specifically recommended for engines that have over 75,000 miles on them, one of them is valvoline max life. you will have to decide what kind that you want, thank you , and hope that this information has helped you.

Okay here is the easiest way to get that cap off ,,,,,Go to the nearest parts store and get a quart of oil and ask them to come out and show you how tpoget that cap off,,you might need to get a new one.And to stop that leak,,,,,,if it is a rear main seal just betweem the motor and trans is where it would leak. Lucas stop leak for motors I used it and it works.

have you looked on the cap where you add the oil?...some will have the type of oil required, printed right into that filler cap...check it out

of course, you could also check your owners manual for recommended grade ..if you still have it.

Most autos made in the last 10 years or so use 5W-30 motor oil. Check your owners manual. Also, it usually is on the oil filler cap on the engine.

Check the oil level. engine off; open hood; pull dipstick; wipe with rag and replace. Then pull out again and read the oil level. If it is at the lowest acceptable level, you need to add one quart. If below that, add more. On the valve cover, there is a cap that comes off for you to pour the oil into. Add some oil, wait a few seconds, then check level again at the dipstick. Do not overfill.

Check your owners manual for which oil to use - normally will be 5W-30, but go with the manual's specification.

My friend, if you do not know where to put the oil, you probably have no business working on your own car. Read your owner's manual throughly. But I will answer your question. You add oil to the engine at the oil fill cap, which is normally located on the valve cover. It is a large cap that will usually have OIL written on the top. You also check the oil level at the oil dip stick. You must have the vehicle parked on a level surface and the engine must not have been run for at least 30 minutes or you will get a false reading. Over-filling is just as bad as under-filling. Do not add oil unless you have checked the oil level properly and you know for sure what you are doing.

onthe top of the valve cover there is a oil cap.if not it is throught the dip stick itself

Hi, Here are a few steps to help you with this issue.

Step1 Make sure your car is level. Any angle can give a false reading. Warm the engine. TURN THE ENGINE OFF. Now wait for a while, to let the oil to come down to the pan.(5 minutes is enough) Now, find and pull out the oil dipstick. If you can't find oil dipstick, check the owner's manual. You will find it on the top of the engine with a brightly colored handle that says "Engine Oil. Step2 Now pull the dipstick out of the engine and wipe off the oil on the stick. Be careful this oil will drip. Once the stick is clean reinsert it in the engine. Step3 Now, pull the dipstick again and check the oil level. It should be at "FULL" or slightly below the "FULL" mark. If it's not below or at the "ADD OIL" mark its OK. It is good to top it. However, this is hard to do without overfilling. If you overfill, the engine will just kick out the excess oil and may leak it on your driveway. If you wait to the add oil mark, your engine will normally take one quart. Step4 Check the oil condition: If it's really black, it's time to change it. Normally you keep track of the mileage since last oil change. CHANGE YOUR OIL BASED ON, TIME IN ENGINE AND/OR MILAGE AS PER THE MANUFACTURERS SPECIFICATIONS. If it's slightly-brown, it's probably O.K.
If it's white (coffee or milk color) it means the engine has a problem. Coolant has mixed with the oil due to an internal engine problem, like a blown head gasket or worse. Call a mechanic. Step5 To top off the engine oil you need to know the oil brand and viscosity. Usually, indicated on the last oil change receipt. If you don't know this, it's best to change the oil and put in one brand.
Find the add oil cap. Again refer to the owners manually. It is usually labeled "ADD OIL" or "OIL"

Add a little amount of the oil. Wait for a minute to let the oil get to the pan. Again check the oil level. (steps 2 & 3) If it's still low, add some more. Don't overfill! Remember to reinstall the dipstick and oil filler cap when you're finished.

Please rate and god bless.