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Discussion Starter · #1 ·
Just checked my oil today per Nissan service manual, (wait 5 min on level service). And noticed my oil level was a bit high after my last oil change service. It is above the top (full) circle approx the same distance as the halfway point between the two circles on the dipstick.

Thoughts?

I've been monitoring oil pressure and noticed it is between 60psi to 80psi (80-85 under hard accel and high RPMs)
 

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My thoughts are...

That the oil level should not be over the top indicator (circle) when following the manuals instructions as you have just did.

If you are uncomfortable with draining some out yourself - I would suggest to go back to the shop that performed your last service and have them do that for you.

Just my 2 cents.
 

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Discussion Starter · #3 ·
Yup already headed back tomorrow. No use wasting time fixing someone else mistake.

now, is this dangerous for engine? I know high oil pressure can lead to ruptured seals and loss of power. So far seems like oil pressure is remaining within normal psi limits (I'm sure the system has a pressure relief valve somewhere).

To drive it or not to drive it?
 

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More than Likely they put 6 full quarts in the car, it calls for 5.9qt w/ filter. I usually end up 5.8qt to get right on the money. Having proper oil level is good and needs to be addressed, But its fine to drive with a bit over the last dipstick hole.

Your oil pressure is OK.
 

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Did you check it a couple of times? Sometimes you will get one oddball reading.

There really isn't much relationship between oil pressure, and oil level, other than when its low, you might have low oil pressure. The pressure is more a show of the thickness of the oil, the temp of the oil, and the condition of the pump/bearings, etc.

When its high, it can sometimes run into the crank, and cause some windage losses.
 

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I always check the oil level in my cars after getting and oil change. This is why, i took my wife's accord down to the dealer to get an oil change, and someone didn't drain all the oil out before filling it back up. i drive the car off the lot and down the road, and BOOM! the car shuts off on the highway and i pull into a chevy dealer. Oil is spewing out the exhaust and the car wont turn. I asked a guy inside there shop to let me barrow a few old empty bottles of oil. I drain all the oil and theres an extra two courts of oil in the block. I was beyond pissed when they claimed they had nothing to do with it and i had to pick up the tab. It blew all the piston rings out and i had to change out the head. I called the BBB and got a new motor at hondas expense ^.^
Story to learn watch the guys change your oil in you beloved GTR
 

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is why, i took my wife's accord down to the dealer to get an oil change, and someone didn't drain all the oil out before filling it back up. i drive the car off the lot and down the road, and BOOM! the car shuts off on the highway and i pull into a chevy dealer. Oil is spewing out the exhaust and the car wont turn. I asked a guy inside there shop to let me barrow a few old empty bottles of oil. I drain all the oil and theres an extra two courts of oil in the block.
They probably didn't drain it at all. I have heard of it happening before. No oil change, just an oil add. If you put double the amount of oil in the engine, its generally not going to be that happy. An extra quart or two won't hurt a car engine.
 

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Discussion Starter · #9 ·
If I'm not mistaken the difference between the top circle (full) and the bottom cricle (low) is about 1 quart??? If so I think they filled it about 1/2 to 3/4 quarts too much. I am aware of windage losses and the dangers of too much oil. But then again isn't the GTR a dry sump oil system? If so I'm hoping all the extra oil is going into the reservoir tank.

Fill me in if my thought process is wrong as I am not an expert in the GTRs oil system.

Sometimes I wish cars like these came with schematics and figures on each system like what we get with airplanes.
 

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Discussion Starter · #10 ·
I always check the oil level in my cars after getting and oil change. This is why, i took my wife's accord down to the dealer to get an oil change, and someone didn't drain all the oil out before filling it back up. i drive the car off the lot and down the road, and BOOM! the car shuts off on the highway and i pull into a chevy dealer. Oil is spewing out the exhaust and the car wont turn. I asked a guy inside there shop to let me barrow a few old empty bottles of oil. I drain all the oil and theres an extra two courts of oil in the block. I was beyond pissed when they claimed they had nothing to do with it and i had to pick up the tab. It blew all the piston rings out and i had to change out the head. I called the BBB and got a new motor at hondas expense ^.^
Story to learn watch the guys change your oil in you beloved GTR
Geez...horrible story. Man those guys at dealerships sometimes just don't give a crap about people's cars. If I wasn't so tired from working so much I'd definitely be more inclined to do the oil change myself but for now I'll be taking my car to reputable places like Stillen. People that care and understand the value and pride and joy of our GTRs.
 

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If I'm not mistaken the difference between the top circle (full) and the bottom cricle (low) is about 1 quart??? If so I think they filled it about 1/2 to 3/4 quarts too much. I am aware of windage losses and the dangers of too much oil. But then again isn't the GTR a dry sump oil system? If so I'm hoping all the extra oil is going into the reservoir tank.Sometimes I wish cars like these came with schematics and figures on each system like what we get with airplanes.
On the RB powered cars, we used to run them about a quart high. They pumped a lot of oil around, and that helped with some of their oiling issues. I blew a few up pulling over 1 G testing, ended up with some crazy oil pan engine modifications.

The GTR is not a dry sump. I think they call it something like a "semi dry". Whatever they call it, its really nothing like a dry sump setup. The oil sits in the pan below the engine, no separate tank.

White Organism Font Line Parallel

I saw a picture recently of the way the oil pickups work in a GT-R. It uses a double cross over pickup. So the suction of the pump is at the G loaded side. Supposedly will do up to about 1.75 G's cornering.
 

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Discussion Starter · #13 ·
On the RB powered cars, we used to run them about a quart high. They pumped a lot of oil around, and that helped with some of their oiling issues. I blew a few up pulling over 1 G testing, ended up with some crazy oil pan engine modifications.

The GTR is not a dry sump. I think they call it something like a "semi dry". Whatever they call it, its really nothing like a dry sump setup. The oil sits in the pan below the engine, no separate tank.

View attachment 32628

I saw a picture recently of the way the oil pickups work in a GT-R. It uses a double cross over pickup. So the suction of the pump is at the G
loaded side. Supposedly will do up to about 1.75 G's cornering.
Sean,

Thanks a bunch for the diagrams! My oil level is about 3/4 of the distance between the two dots above the Full dot. Whatbdo you think about driving it this way? Is it risky or ok?
 

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I went through the same thing and my car was like that from the factory...not in the middle I checked it all kinds of ways and it was still a little over the hump.

I replace the oil at 2800 miles(no filter change), pumped it out the top and suprisingly got almost exactly 6 quarts out. Filled it backup up with basically 5.8ish quarts and It still seemed a tad high. Guess I could pump 1/4 quart out but I'm just not to worried about it. Against my better judgment I'll most likely let the dealer to the full change at 6k so it gets in the record books...then again I may not :) I have a theory that the more times you take your car to the dealer the more you have to take your car to the dealer. They always do something strange and I find it later.
 

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Discussion Starter · #15 ·
Interesting... I wonder where mine stands. As long as am not doing any damage I'm ok with it. But the question remains.
 

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the manual says idea level is 10mm below the H line

on 09-11 models is 5 3/4 qt with a filter change 5 1/4 without a filter change

and on 12s its less 5 1/4 liter with 4 3/4 without a filter change
 

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the manual says idea level is 10mm below the H line

on 09-11 models is 5 3/4 qt with a filter change 5 1/4 without a filter change

and on 12s its less 5 1/4 liter with 4 3/4 without a filter change
What changed on the 2012's to run 1/2 quart less oil?
 

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Interesting... I wonder where mine stands. As long as am not doing any damage I'm ok with it. But the question remains.
10 quarts might cause damage. 6-6.5 isn't going to do much. I have had plenty of oil pans off cars in my life,and done a bit of experiments filling them, and looking at how oil moves around.

Remember when the engine is running, there is oil being pumped all around the engine.
 

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Discussion Starter · #19 ·
Ok so about a half inch above the full dot is ok? I have no clue what a 1/2 inch above full represents in quarts?
 

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Discussion Starter · #20 ·
10 quarts might cause damage. 6-6.5 isn't going to do much. I have had plenty of oil pans off cars in my life,and done a bit of experiments filling them, and looking at how oil moves around.

Remember when the engine is running, there is oil being pumped all around the engine.
Sean,

I took it back today and it turned out to be about 1 and 1/2 quarts too much (or 1 1/2 quarts above the H Full line). I hope this didn't cause anything to the engine that would cause future concerns. It is dead nuts on the Full Circle right now.
 
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