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We had the motor replaced on our 06 M/T Z at approximately 5500 miles. I've been monitoring the new engine and it appears to be burning oil too although not as bad as the original engine. We even took it back to the dealer once before my wife took a trip out of town. We just wanted them to do an "official" oil check before the car took a trip. Turns out it was 1.3 quarts low already. It's getting low again. We'll be going back to the dealership soon.
 

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We had the motor replaced on our 06 M/T Z at approximately 5500 miles. I've been monitoring the new engine and it appears to be burning oil too although not as bad as the original engine. We even took it back to the dealer once before my wife took a trip out of town. We just wanted them to do an "official" oil check before the car took a trip. Turns out it was 1.3 quarts low already. It's getting low again. We'll be going back to the dealership soon.

1.3qts low after how many miles?
 

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About 1,000 miles when the dealership added 1.3 quarts. We had them document it.

I was hoping maybe that's normal for a new engine being broken in. But since then it seems it's burned a noticeable amount. It'll be going back to the dealership very soon. I'm curious what they'll have to say this time.

Still not as bad as the original engine. My wife had the oil topped off at a Nissan dealership in Little Rock Arkansas while she was on a business trip and it was pretty low by the time she got back to Fort Worth. That was when the dealer agreed to replace the engine. What's strange is that we could never detect any smoke from the exhaust even though it seemed to be consuming oil like crazy.
 

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About 1,000 miles when the dealership added 1.3 quarts. We had them document it.

I was hoping maybe that's normal for a new engine being broken in. But since then it seems it's burned a noticeable amount. It'll be going back to the dealership very soon. I'm curious what they'll have to say this time.

Still not as bad as the original engine. My wife had the oil topped off at a Nissan dealership in Little Rock Arkansas while she was on a business trip and it was pretty low by the time she got back to Fort Worth. That was when the dealer agreed to replace the engine. What's strange is that we could never detect any smoke from the exhaust even though it seemed to be consuming oil like crazy.
Check your intake/PCV valve. It could have been a PCV issue. Did the car have hesitation/detonation issues too?
 

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Check your intake/PCV valve. It could have been a PCV issue. Did the car have hesitation/detonation issues too?
No noticeable hesitation/detonation.

Is a faulty PCV valve a common issue on Zs?
 

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No noticeable hesitation/detonation.

Is a faulty PCV valve a common issue on Zs?

A PCV is a PCV. Any car could get one that somehow got stuck open and allowed oil to be sucked into the intake in copious amounts. Us LS1 guys have a crappy entire SETUP, hence why a couple of companies make catch cans specifically for our cars. We use .5-2qts per 3K miles due to our PCV system (LS1 guys, not you Z owners) and due to our low tension oil rings and short skirt pistons. I PERSONALLY have noticed about 1/3-1/2 qt of oil loss in 2,000 miles.

Your 1.3qts per 1000 miles is rediculous. The PCV was a long-shot. Someone needs to fix your problem I agree!
 

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Oil consumption can be caused by the following:

1. Faulty rings
2. Faulty PVC system
3. Driving habits

The first 2 are obviously serviceable issues while the last one is partially under your control.

OK, picture yourself driving the Z. You wind up in second gear. You bring the RPMs close to redline and let off the throttle. You don't push in the clutch or put the transmission in neutral. You are just coasting down,in gear, with the throttle closed... still turning relatively high RPMs. At this point, no matter what car you are in, you are burning oil. You have high crankcase pressure and a high vacuum in the cylinders. Oil WILL be drawn past the rings and burned.

So if a car has a marginal ring package, one driver's driving habits can completely exaggerate the issue. While it goes unnoticed by another driver. This is not pointing the finger, just an FYI.

Good Luck,
Ronin Z
 

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I have a 2006 Touring 350Z 6 speed, bought new 6/2006. At 2990 miles, the oil was measured to be 3 1/2 quarts low. At 4800 I got a new engine. At 6800 miles they replaced the cam shafts. Oil is still being consumed at 1 quart per 1000 miles. An attorney is filing an arbitration with Nissan, and is taking it to the state attorney general if that doesn't work, filing 2 law suits for repurchase of the defective car. The entire time we've owned the car, it feels like it's not even ours. We've been pressured with "oil consumption tests" to put as many miles on it as quickly as possible. The car has been in the shop 5 times and Nissan admittedly says they have NO CLUE what the problem is or how to fix it. My advise, seek legal representation and let them handle it. This is not a normal problem, nor should we overlook it by just adding oil. I don't know about you, but this was my dream car that I waited for 3 years to purchase. I did my research and only found these oil consumption problem posts after the fact. I expect Nissan to stand behind their product.
Good luck to you poor Z owners in the same position. It's not fun!! (I still LOVE my car and will buy another when the suits are finished.)
 

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dont bother spending your time checking the PCV .. i had mine checked and its show me no symptom of getting stuck..
my 03 at 72000km burn 2-3 quarts every oil change and i have my oil changed at every 4000km (i am using motul 300v 10w40)

i believe it is just the habit of driving ... when cruise my 4000km below 3000rev, the engine burn less than 1 quart, sounds like the faulty rings to me
 

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*Update*

Nissan is putting in a Flight Recorder tomorrow morning. Gotta keep it for 500-700 miles and then I apparently get a motor? We'll see. Either that or the oil has to stop burning.
 

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*Update*

Nissan is putting in a Flight Recorder tomorrow morning. Gotta keep it for 500-700 miles and then I apparently get a motor? We'll see. Either that or the oil has to stop burning.
Ouch, I just got around to reading this thread... years ago I used to be a service tech at a Honda dealership... when they would bring in a regional service engineer and rig the customer's car up with a datalogger (flight recorder), most of the time the end result was to void the warranty for "customer abuse". I hope that is not the deal in your case.

Good Luck,
Ronin Z
 

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Ouch, I just got around to reading this thread... years ago I used to be a service tech at a Honda dealership... when they would bring in a regional service engineer and rig the customer's car up with a datalogger (flight recorder), most of the time the end result was to void the warranty for "customer abuse". I hope that is not the deal in your case.

Good Luck,
Ronin Z
If thats the case then thats F**king BS. Be carefull I've be taken for a ride on Nissans BS wagon before and it sucks.
 

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Well, I got my car back from the dealer abt a week ago. In the paper work, they stated it was bad piston rings :banghead: . Ronin Z, thanks for the info. I just have to check it around 1,000 to 1,500 miles to see if the consumption continues :headshake:.
 

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*Update*

My new mod is the best! Before now, I've never enjoyed having a mod that doubles as a companion and a RAT!

...


The flight recorder status light is bugging the jeebus out of me @ night. I gotta put some tape over it or something. BTW - I'm officially calling the flight recorder my newest mod. :lol:
 

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I had problems with my rims and i got the run around from nissan. I told them they conduct bad business and they didn't seem to care.
 

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you're exactly right STANGER.

i just got my car back last night. they had a nissan engineer check it out. i didn't get a new engine just yet. apparently the 06 rev-up is known to burn oil up until 15K miles :headshake:

also, letting the revs fall @ high rpms is what's causing the oil to leave the engine.

FYI- i was running Mobil 1 Extended 5w30 for what it's worth and apparently it's very thin.

SO...i'm on an oil consumption test right now. they topped her off w/ Elf Synthetic so yeah.

now it's another waiting game. we'll see in 3K miles if i get a new engine...
I have an 06 manual, at my first oil change I started using Royal Purple 5w30. I have around 9k mile now and my oil level is perfect. Maybe there is something to the type of oil your using. I don't know, best of luck.
 

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No problems at all with mine, 4000 miles and 1 oil change. Maybe going to synthetic too soon before the motor is fully "broke-in" is the problem. I normally wait until 5000-10,000 miles before going to synthetic. Ofcourse if you are having problems and not running synthetic, then who knows.
 

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I have a 2006 Touring 350Z 6 speed, bought new 6/2006. At 2990 miles, the oil was measured to be 3 1/2 quarts low. At 4800 I got a new engine. At 6800 miles they replaced the cam shafts. Oil is still being consumed at 1 quart per 1000 miles. An attorney is filing an arbitration with Nissan, and is taking it to the state attorney general if that doesn't work, filing 2 law suits for repurchase of the defective car. The entire time we've owned the car, it feels like it's not even ours. We've been pressured with "oil consumption tests" to put as many miles on it as quickly as possible. The car has been in the shop 5 times and Nissan admittedly says they have NO CLUE what the problem is or how to fix it. My advise, seek legal representation and let them handle it. This is not a normal problem, nor should we overlook it by just adding oil. I don't know about you, but this was my dream car that I waited for 3 years to purchase. I did my research and only found these oil consumption problem posts after the fact. I expect Nissan to stand behind their product.
Good luck to you poor Z owners in the same position. It's not fun!! (I still LOVE my car and will buy another when the suits are finished.)

Doesn't this fall under a simple 'Lemon' law criteria or is that only specific to California?
 

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I just joined this forum hoping to find other cases of `06 oil consumption so that I can arm myself with documentation as I begin negotiations with my dealer.

I have a 06 6-speed that is using ~1qt/2K miles. The dealer is monitoring it although they don't seem to care much about commenting and/or doing anything about it. It's time for my next oil change (3.5 miles since last) and I have been reluctantly taking it to the dealers shop only because of the consumption problem (I always change my own oil and use synthetic) and the dealer has been installing stock 10/30 petrolium based product vs. synthetic.

I now have ~13.5K miles and have had to add many quarts between changes. This is my 4th Z/ZX, over many years, and I also have a 03 Murano. My last 90ZX had +100K miles, all synthetic, and never required additional nor does my Murano. There is obviously something amiss with this motor. I intend to start hounding the dealer to address the problem.

Having to add oil isn' the end of the world but it shouldn't be necessary let alone how it is effecting the plugs and ?? I don't look forward to an early tuneup because the plugs are fowled and them to say "...that's a maintenance item and you are responsible for the bill..." before the car has 36K miles!

Good luck to you all and I'll post a followup on my results.

Kurt
Largo, Fl.
 

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Oil consumption can be caused by the following:

1. Faulty rings
2. Faulty PVC system
3. Driving habits

The first 2 are obviously serviceable issues while the last one is partially under your control.

OK, picture yourself driving the Z. You wind up in second gear. You bring the RPMs close to redline and let off the throttle. You don't push in the clutch or put the transmission in neutral. You are just coasting down,in gear, with the throttle closed... still turning relatively high RPMs. At this point, no matter what car you are in, you are burning oil. You have high crankcase pressure and a high vacuum in the cylinders. Oil WILL be drawn past the rings and burned.

So if a car has a marginal ring package, one driver's driving habits can completely exaggerate the issue. While it goes unnoticed by another driver. This is not pointing the finger, just an FYI.

Good Luck,
Ronin Z


Ronin,

I am interested in what you said here.
I seldom, if ever, allow the car to reach a high RPM and then just let off the gas and allow it to cost down.
I am one of those drivers that burp and down shift when changing speeds or slowing down for a stop. I do not drop down into a lower gear without the burping of the gas to keep the RPM's up though. I have aways been told that this is bad for the tanny and I can see why.
However, would this type of driving fall into the same catagory as you describe above???
 
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