Cough, cough.... forgive me, but that is pure "bovine scatology". Piston rings, especially very hard ones that are in this engine, take quite a long time to seat. Break-in period is quite long. For heavens sake people.... RELAX!! How long must this insanity continue before people will just give these engines 10K miles to properly break-in?

My engine..... 9500 miles..... oil consumption..... NIL!! Yes, it did use quite a bit of oil during the first 5 or 6 thousand miles. But now..... NOTHING. A B S O L U T E L Y N O R M A L !



(WOW)

Your engine is still young dude. Mine didn't start drinking too much oil until about 15k miles. I am at 17,700 and going through 2 quarts every 3k miles. Just because your engine is acting normal now doesn't mean there is no problem with any other 370Z engine on the face of the earth.

6mt is right.....in most cases!

I will however side Import111 in cases like his and mine. My first engine did not use oil until around 6k.

There are only two possibilities for hight oil consumption

may quality issues including normal human overload because of cost reduction on the powertrain production (price orientated hight power product not hand crafted) or coustomer rpm abuse at cold oil
a) piston and ring surface (honing in production)
b) intake valve

are the heads replaceable in the engine bay or does the engine has to be removed because of the abnormal "low" noise that was mentioned , this sounds more like a head problem. Abnormal piston noise is louder :-)

I have no oil consumtion @ 10k km with the first oil, what is normal for proper brake in and of course no abuse and all todays engines behave like this if there was no quality issue in production.. oil type of course didnt matter because of API (for the oil popes who belive in healing through blessed fluids..best indulgence discussions)

Maybe this has something to do with it.

NISSAN | Ultra-low Friction Diamond-like Carbon (DLC)

H.

:happydance:

I heard that low friction DLC just makes the oil 'slip' past the valve seals and burn off more easily :stirthepot:

Huh?

So much misinformation in this thread. No piston rings take THOUSANDS of miles to break in, at least that should never be the case. With an OEM engine that has plateau-honed cylinder walls and pre-lapped piston rings, your rings and cylinder walls will break in within a matter of seconds. Really all you're doing in the first couple hundred miles is ensuring the peaks of the oiling cross hatch are flattened all the way (the plateau honing process gets most of this done) and that all of the valleys are cleaned out.

If you're having oil consumption past 1000 miles or so, there is likely something wrong that will rear its ugly head later. An engine has only so much "time" for a proper break-in to occur - after that window, your cylinder walls will likely be permanently glazed to some extent.

OEM-recommended break-in procedure is just CYA on their part.

That said, who knows where the root cause of the oil consumption problem on the VHR lies... Nissan will likely never admit to their fault. But I don't understand the point of a bunch of people who have probably never even touched the inside of an engine throwing around a bunch of conjecture. I'm fine if a bunch of experienced engine builders and tuners like myself want to have an intelligent, experience-based discussion proposing what the root cause might be, but what's going on in all of these oil recommendation and oil consumption threads is just asinine.

Most of these engines are machine built. I wonder if it is a certain VIN range that is having trouble.

What?!? How dare you be sensible! My God man, this is the Internet after all!!! You can't expect the voice of reason to carry the day - that will never do!


;)

This is not a problem of DLC, this is normal for all (0W60), 5W30 winter & summer oils that are put inside the engine because of a world wide climate selling strategic desicion because of a cheap purchase deal for this oil. This oil has a higher consumption if the engine is not hot (often short track driving MacDonald disease.. i have the 2 fast and 2 furious pick up tool ever..joking ) . Its only normal temperature tolerance with high viscosity oil.. physics ..thats all. That means not that this viscosity is a bad choise, it only has a higher consumtion than a 10W40 (allowed in the 370z german service manual) in the cold start phase..thats all. Of course its the best choice for the manufacturer.. But if you read the nissan bulletin..there must be a production issue too.. and that is not acceptable...
P.S. this funky oils kill the mass flow senor faster if you have a turbo engine and a high rpm longtime abuse driver in cold start phase and some age on the turbo bearing..selfdestruction procedure with the knowledge gap blubbering forum users...the preference dividend of the tuners (colored pullys):tiphat:

0W60 was advertised and sold in germany some years ago (6) ..sorry ******** product

I am at 28,000 miles, currently. Actually awaiting the oil analysis (to be done today @ Blackstone). Last oil report had an elevation in lead (which they attributed to a bearing streak...which makes me a little nervous).

I have used Castrol Syntec 0W-30 since 5000 miles and have had ZERO oil consumption beyond 1500 miles. Lower cold viscosity doesn't affect consumption that much on cold starts because it gets COLD here (single digits during the winter).

Just throwing that out there.

Late,
Trav

..and saying that your rings are seated within a few seconds is just as much misinformation. Sure if you are cutting limbs off a tree with a chainsaw you can go through them in a few seconds but when you are wearing in rings which are very hard against your cylinder wall that are suppose to be resistant to wear you are going to "seat" in somewhat but definately not fully. You are basically machining materials which are resistant to wear and it doesn't take seconds. Show me ONE profesional racing team that races a car after a few seconds of break in.... not qualifying but a full race.

I agree with you that there is a lot of misinformation in this thread but going to the other extreme doesn't help.... there is enough exageration going on here. There are a hand full of motors that do suffer from oil consumption - just like any other manufacture.

For the record my oil consumption has significantly reduced in 15,000Km...