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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-20-2017, 02:30 PM   #1
Stephenson234
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Join Date: Dec 2016
Location: 1716 east 32nd street
Posts: 16
My Ride: 2002 bmw 325i
Misfires after adding oil

Ive looked around online and cant seem to find answers to my problem. So ive been leaking or using quite a bit of oil so today i grabbed some lucas oil stop leak that my friwnd suggested and i also got 5 quarts of oil. I put about 1/4 of the bottled of lucas oil leak stop in the car and followed by 1 and a half quarts of oil.
After that i started the car and immediatly it was running rough, to me i think oil or the lucas oil stop leak got in the spark plugs and is making it misfire. Any one have this issue? The car drives just very slow and sounds like a subaru almost. What will i need to replace? A gasket maybe?

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Old 04-20-2017, 02:40 PM   #2
Fox Fader
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First off, with all due respect, your diagnosis seems way off base. Yes yo need a gasket, not oil stop leak? Fix the leak the right way. Mechanic in a bottle rarely ever works.

Did you overfill it? A plug or two is fouled, coil bad...
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Old 04-20-2017, 02:46 PM   #3
cvx5832
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Quote:
Originally Posted by Stephenson234 View Post
Ive looked around online and cant seem to find answers to my problem. So ive been leaking or using quite a bit of oil so today i grabbed some lucas oil stop leak that my friwnd suggested and i also got 5 quarts of oil. I put about 1/4 of the bottled of lucas oil leak stop in the car and followed by 1 and a half quarts of oil.
After that i started the car and immediatly it was running rough, to me i think oil or the lucas oil stop leak got in the spark plugs and is making it misfire. Any one have this issue? The car drives just very slow and sounds like a subaru almost. What will i need to replace? A gasket maybe?

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1.) Don't use Stop Leak, fix it right
2.) Read codes
3.) Search the numerous leak threads and get eyes under the engine without the splash guards and reinforcement. Yes it's a gasket, and only you can tell where it's coming from, most likely from multiple locations
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Old 04-20-2017, 02:46 PM   #4
Stephenson234
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Join Date: Dec 2016
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Quote:
Originally Posted by Fox Fader View Post
First off, with all due respect, your diagnosis seems way off base. Yes yo need a gasket, not oil stop leak? Fix the leak the right way. Mechanic in a bottle rarely ever works.

Did you overfill it? A plug or two is fouled, coil bad...
It was just a recommendation from a friend, i beleive the oil leak is coming from the oil pan housing gasket, i dont have time right now to fix it. I did not over fill it. So my valve cover gasket would need replaced to stop oil from getting in the spark plugs?

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Last edited by Stephenson234; 04-20-2017 at 02:47 PM.
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Old 04-20-2017, 03:03 PM   #5
JDA33
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Quote:
Originally Posted by Stephenson234 View Post
It was just a recommendation from a friend, i beleive the oil leak is coming from the oil pan housing gasket, i dont have time right now to fix it. I did not over fill it. So my valve cover gasket would need replaced to stop oil from getting in the spark plugs?

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If you are getting oil into your plugs and such then yes, the first thing I would do is replace my Valve Cover Gasket.
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Old 04-20-2017, 04:06 PM   #6
SSchwab
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Oil can leak into spark plug holes because of hardened or cracked grommets. Pull each plug to inspect for oil fouling. If there is fouling, buy the valve cover gasket kit with grommets.

But loss of oil can be from clogged CCV system and/or stuck oil rings on pistons.

What color is your exhaust?
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Old 04-20-2017, 04:08 PM   #7
jfoj
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So unless you have the ability to read Fuel Trim values, you have no idea what is going on.

My guess is there is a crankcase air leak and/or a questionable oil fill cap seal.

I doubt the additives had anything to do with the misfire. If the engine was not fully warmed up this could be just a typical misfire from the engine being shut off and restarted quickly.

I doubt the leak is the oil pan gasket exclusively, it is more likely the valve cover gasket and/or the OFHG. Almost every E46 need these replaced long ago. Most are leaking by year 10 and need the valve cover gasket, OFHG and CCV along with hoses replaced.

The CCV lower oil return line is most likely broken and leaking vacuum and oil at this point as well. This reduction in crankcase vacuum can cause the oil pan and/or rear main seal to leak as well, but if and when the CCV and hoses are replaced and the crankcase vacuum is restored, often the oil pan/rear main seal leaks are reduced.

As mentioned, fix the car properly. Forget what your friends tell you. Listen to knowledgeable Forum members. Read this thread at least 3 times: http://forum.e46fanatics.com/showthread.php?t=897616

If you have a smart phone or table, get an OBDII App and interface so you can read the codes along with Live/Realtime or Freeze Frame data then you will know exactly what is going on with the engine fuel management system.

The OBDFusion App and proper VeePeak interface from Amazon are less than $30 for both for iProducts, less than $20 for both for Android

OBDFusion for Android is is $3.99.

https://www.amazon.com/Veepeak-Bluet...peak+bluetooth

OBDFusion, for the iProducts it is $9.99.

For iProducts you NEED a Wifi adapter or LE Bluetooth adapter which are more expensive and VeePeak does not offer these yet..

iProducts requires Wifi - https://www.amazon.com/dp/B00WPW6BAE...ywords=veepeak

Read this thread at least 3 times: http://forum.e46fanatics.com/showthread.php?t=897616
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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