I checked the oil level a few days ago and it was really low. It was the first time I added oil since I bought the car last month, and I have no idea which type of oil the previous owner used. So, I just added about a quart of Castrol GTX 10W-30 High mileage motor oil to bring it up to the halfway point between low and high marks on the dipstick.

Since then, my engine (7afe) had been acting up. For instance, the engine sometimes vibrates very roughly when I stop at the traffic light or driving on highway; engine sometimes get really noise; and the car feels sluggish sometimes. (Symptoms are more noticeable after driving for awhile. Not with cold engine)

So, I am just wondering if this is normal or maybe something is wrong with the engine?

Note: Do you think it has anything to do with the catalyst converter? Last month, I was told that there was a small leak on the catalyst converter and I will need to get it replaced eventually.

This post has been edited by DaijoubuDa: Oct 31, 2013 - 6:34 AM

check the oil again. but adding oil shouldn't make a motor worse if you fill properly.

Is the check engine light on?
I would check the distributor cap and the plugs and the cables first.

This post has been edited by aiq: Nov 1, 2013 - 3:55 AM

It's most likely a coincidence. The only way I could think that the engine would be that effected by oil is if there is heavy sludge and the oil is old.

^+1, whenever you buy a used car. Always do a tune up because you never know when was the last time things were replaced.

No engine light is on, and tbh the car just passed the NJ state inspection last week... Right now, I suspect there is also problem with the driver side strut/wheel because the car feels a little bouncy when I am driving. I guess I will just bring the car to a mechanic to look at just to be safe.

Current Oil Level:
http://i237.photobucket.com/albums/ff36/ry...1030_161833.jpg

This is how my cold engine sounds like at the moment:
http://s237.photobucket.com/user/ryopso/me...153825.mp4.html

your oil level is very low, its less than half, the oil level has to be at the second line.

btw on photobucket if you click get links, it will show serval codes. If you copy the IMG code, the picture will show in the threads instead of having to go to your photobucket

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I guess I was misinformed then. People always told me to add when it is below the "L" mark and it is fine if the oil is in between.

>

I am aware of that but sometimes the picture seems to stretch the page too big/too long >.>

Yes its suppose the oil level is suppose to be in between the L-F but it's just common sense that it's best to either be halfway or full. Just like how we wouldn't want to go out of town on a gas tank that's close the E/L.