Oil overfill
 

I checked my oil this morning and almost below the L mark.
L o-l----------o H So, I went to autozone and bought a 1 quart of oil. Pour like about 70% of oil into the engine and the reading now goes up like this
L o-----------lo H ...Do you think this is safe or I over refilled my engine? it's almost at the H dot mark though.

You're within tolerances according to the dip stick. I don't think it's a problem. Now this is assuming that's the oil level when measured cold (engine has set overnight and all the oil has drained to its lowest point) and your Z is on a level surface.

Park on a level ground and wait 15 minutes than check your oil.

I already did not just even 15 minutes but almost 4 hours when I checked it.

over the H is too much, AT the H is fine

are you talking about the dot?

so guys what is your input about it? any answer will be greatly appreciated.

Car Bibles : The Engine Oil Bible
Read the part about overfilling the engine oil. Enough to scare me.
I'd personally drain a little out. Won't take you more than 15 minutes.

Is this your first car?? Slightly over has no impact at all. Just don't go 1/2 to 1 qt over or you'll have issues.

With the engine being warmed up after getting to Auto Zone, you should have added "no more than half a quart". You can't get an accurate oil level measurement on a warmed up engine. Adding just a half a quart, would keep your engine safe(not to high/not to low). You could check the oil level later when your car has sat(when the engine is cold).



I disagree! It can make your engine sluggish and restrict power and performance. Because of the added pressure it takes to pump, the over added amount!
And you could spring an oil leak, due to the added pressure on the system!

Maybe you missed the part where I said "Slightly".....

His isn't even up to the H.

Yes, I saw Slightly! I still don't agree with you. bradz measurement has nothing to do with my disagreeing with you.

yeah I waited overnight to have an accurate measurement and the reading is still the same as I stated above. i'm in a flat ground when I did it so i'm sure my reading is accurate.

Why is this a debate if he's not even above the 'H' mark? I could understand all this back-and-forth if the reading was:

L o----------------o H |

If it's between the L and H, leave it alone dude. If it's still bothering you enough that you don't trust the high and low indicators on the dip stick, crawl underneath, crack the drain bolt and let some out. Then you can worry about the crush washer being retightened without being replaced...which would be a bigger worry if you ask me. Thus, if it's between the indicators, leave it alone.

You probably like to scare little children on Halloween too, don't you?....LOL..... I guarantee you, a 1/4" difference on the stick (my def. of "slightly"). Won't make a hilll of beans difference in pumping losses or over pressurization... There's a good amount of "idiot proofing" built into all modern engines.Try it and see...

:iagree:

:worthless:

If you are in doubt, keep it around 1/2, you will end up causing more damage by misreading the dipstick and adding oil when it is not needed.

if someone has a dipstick pic mayby they can point out the limit for him, I didn't know it was that complicated!

You have your tolerances and limits, I have mine.

if you'll lose sleep over it,
drain some out.... will be messy to tighten the bolt while oil is flowing out :icon14:

Honestly, with the oil consumption issues our cars have (at least mine). I check once a week and try to keep my level exactly at the high level.

I understand that it may be unacceptable in this day and age to require such frequent checks of oil level. But think about what Nissan has done with this engine. It started out in 1995 as a 2.0 liter and now is a 3.7 liter 332 HP monster. They have really delivered an amazing engine at a great price. I'll give them the benefit of the doubt.

Better safe then sorry.

With that said, I have had some very reputable mechanics (Curry's Auto in NOVA) tell me that it is better to be a 1/2 quart low then a 1/2 quart high.

Moral of the story...Keep it close to or below full.

There you go. ResIpsa is purposely keeping the level where you have it now. Not sure of the merit in keeping it at the H, but at least you're not alone now :).

Thanks for the inputs guys. It bothers me all the time so, I ended up changed my oil at Nissan. Now, I'm okey :tup:

FWIW, I changed my oil today and wouldn't you know it that I overfilled. A quick trip to Home Depot got me 25' of 1/4" polyurethane tubing for $3. I cut it to about 6' long and it slides down the dipstick port easily. I was able to siphon out some oil and get the dipstick reading below the H dot.

haha, good for you. did you make any mess? what did you use to suck the oil up?

Why is everyone saying to wait until the engine is cold to check the oil? The owners manual says to get the engine to normal operating temperature, shut it off for 15 minutes and then check it. It's still pretty warm at that point.

You can use a big syringe, I've done it before.
Your right it does! But that's new(s) to me, I've always been told to do it when the engine is cold!

I actually just sucked on it with my mouth (this line not to be taken out of context) and then quickly put the end in the bottom of a bucket before I ate oil. No mess at all.