Discussion about the VK in modern application in regards to oil consumption

[qship96]

Considering many of the VK engines are burning 1 quart per 1000 miles+/-, if the pcv system was the main cause of this oil burning{as compared to oil getting past the piston rings} the catch cans would need to be huge or emptied frequently.....we are not seeing catch cans filling up anywhere near approaching 1 quart of oil per 1000 miles.......some{most} of the oil is getting past the rings and burning in the combustion chambers.

Who cares about Northstars?????? We are talking about people purchasing 50K+ Infinitis and having real problems with oil consumption- lets not try to justify or bury the real problem that still exists 8 years after the vk45 introduction!!!!!

[NightRiderQ45]

qship- as usual you seem to have no idea what is going on around you. Go back to the dinosaur forum and stop causing trouble over here.

The engine doesn't usually "blow" as we would think of it. What happens is they are often neglected to the point of permanent damage.

What makes the Q45 forum a dinosaur forum?? I thought that it is well known that those engines consume a lot of oil...there is no type of way that I will pay that amount of money for a car and have to deal with catch cans and a motor that burns 1qt every 1k miles imo. Thats horrible and that is the reason why I'm not looking at the M for my next car. More arrows are pointing me towards the Lexus GS 350.

[qship96]

[QUOTE=SteveTheTech]qship- as usual you seem to have no idea what is going on around you. Go back to the dinosaur forum and stop causing trouble over here.

That is a rather uneducated and immature comment. The "trouble" is caused byInfiniti, not my doing.....seems YOU are the one with no clue of what is going on around you!!!! Funny you mention "dinosaur, when you own an ancient little 6 cylinder J30 purchased decades after manufacture for pennys!!!! Follow your own advice and stick to the J forum......see how childish and Uneducated that sounds???????

[Poyzinous]

I think what Steve meant is that he's not on the J forum writing his fingers off about how much the M sucks and guzzles oil. Steve is correcting you because your comments have no facts or truth to them out of the ordinary. There are no faults in the internal motor components. If there were, like the revup (VQ) motor in the G and 350z, Nissan would have redesigned the block. But wait, they haven't redesigned the block, which means... BINGO! there's nothing wrong with the VK block consuming oil. Its the intake, like Steve has proven. So that whole comment about the block burning oil, you can just Its not true.

[qship96]

Nonsense!!! If the block{rings} were "perfect" and not responsible for some{most?} of the oil burning, and the pcv system is the culprit, then we would be seeing HUGE amounts of oil being trapped in members installed catch-cans....considering somee VK motors are burning 1qt per 1000 miles.....why are we not seeing antwhere near that amount being trapped in the catch cans???? BECAUSE it is slipping past the rings into the combustion chambers!!!!

If the problem was as simple as just the pcv system, Infiniti would have corrected it by now!!!!!! There is no way to correct the low tension rings without robbing HP.....why there has been no "fix" from Infiniti.

Unfortunatly the oil burning problem is not M specific......Q45,Fx45,M45....Infiniti refuses to redesign to cure a known major problem


Modified by qship96 at 12:41 PM 12/17/2009

[maxnix]

There are no faults in the internal motor components. If there were, like the revup (VQ) motor in the G and 350z, Nissan would have redesigned the block. But wait, they haven't redesigned the block, which means... BINGO! there's nothing wrong with the VK block consuming oil.

Nissan in fact did redesign the early non metal backed timing chain guides, and they completely overhauled the design for thenew VQ37. Even the VK50 recieved several upgrades.

Are you really a tech? Or are you just drinking the Kool-Aid? You certainly cannot be a Senior Infiniti Technician who was trained on the G50 in 1989.

[qship96]

Keep in mind he and Steve the tech are in their mid twenties........oh to be young and think you know it all again!!!! They were todlers when the G50 and Infiniti line was introduced in 1989!

[elwesso]

i know the early VK (03-05) have had oil consumption issues, but did they fix it in later models, or is it the same story?

For me personally, it woudnt bother me.. a quart every thousand maybe, but i think many of them are more like a quart every 3000, which IMO isnt terrble (but not good)..

Also, lets not forget we dont hear of most of the engines that have no problems.. The ones we hear about are the ones that burn a lot of oil, and other ones are running along just fine...

[Skibane]

As someone who only buys used cars, it would be much more of a concern for me than for the car's original owner, since I don't have any way of knowing whether previous owners were diligent in keeping enough oil in the crankcase to prevent damage.

Even though most NICO members are smart enough to check the dipstick on a regular basis, the same can't be said for car owners in general...

[Q45tech]

How do you go backwards in HP and torque per liter when you have already promised so much.

Years ago [20] 278 HP and 292 lb/ft from 4.5 liters was a lot then came 340 and 340 or the derated 325/333 [after a ring supplier change].

All the engine desigers know what happened.................you cannot go too far with racing tricks on a engine for the great unwashed masses, They will trash it quick everytime from improper breakin and mainteance.

Study what happened to BMW with their 4 liter silicon treated cylinder bores and oil consumption.http://www.usautoparts.net/bmw/engines/nikasil.htm

A similar situation can occur from just ring alloys alone but in this case sulfur in gasoline is not the problem just the gasoline itself.

[elwesso]

if I have to add a quart of oil every 3 months for an extra 10HP over everyone else, I'll live with it... I consider a quart of oil every 1000 miles excessive, but a quart every 3000 isnt what I would consider excessive. Look at it this way, if you were one of those people that got one of the oil burners, you got a new engine...

Its almost the same thing as "why would I pay 50k for a car that uses premium gas, if I'm paying that much they should design it to use regular gas"..

Anything worth having is worth maintaining... Anything that doesnt require surely has to compromise something... Some people just arent qualified to have real cars, and should go buy honda accords and toyota camry's, which are great cars for what they are... not for me.

[Skibane]

How do you go backwards in HP and torque per liter when you have already promised so much.

You don't derate - You slap a 12 quart oil pan on it, and jury-rig the ECM software so that the engine goes into limp-home mode if you drive more than 5K between oil changes...