Oil question

nis350 · 11-17-2014, 04:50 PM

Isn't 1 qt per 3k miles a bit excessive?

the oil consumption maybe related to the fact that the engine is more broken into after you switched to 0w-40

Quote:

Originally Posted by MJB

I used 0w-40 in my Z for almost 3 years. My 09 was burning a qrt of oil every 3k miles. After I made the switch to 0W-40, I would burn maybe 1/4qrt every 3k miles and oil temps were a bit lower as well. You'll be fine. Just switch back to 5w-30 if you want on your next oil change.

MJB · 11-17-2014, 05:18 PM

Quote:

Originally Posted by nis350

Isn't 1 qt per 3k miles a bit excessive?

the oil consumption maybe related to the fact that the engine is more broken into after you switched to 0w-40

As long as the level on the dipstick doesn't drop more than 10mm per 1.5k miles, Nissan says its ok. I think mine was right about 9mm. I bought my car with 10k miles on it, and switched to 0w-40 at around 20k miles. I had read somewhere that since our engines produce so much heat, and oil temps tend to stay really high, that 5w-30 can thin out enough to slip pass the rings, and that a thicker oil may help with oil consumption. It worked for me.

juld0zer · 11-17-2014, 05:39 PM

i did a mini-overhaul of my CVTC/VVT system about 6 weeks ago. Prior to the work, the car was reluctant to rev beyond 4000rpm. I was running 5w40 to try increase oil pressure but it's effect wore off so hence i decided to overhaul it. This was at 58000km.

What i replaced was the o-rings on the camshaft covers, the seal between the cover and timing chain rear case, the VVT filters, one solenoid valve as it was leaking thru the electrical connector.

In short, 5w40 will have slightly higher pressure at operating temp. But personally, i'd stick to the handbook recommendations - 5w30. VVT systems are vital to the performance of modern engines and they can be very fussy with oil.

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juld0zer Enthusiast Member Join Date: Nov 2012 Location: Sydney Posts: 428 Drives: 11 Nissan 370Z MB M6 Rep Power: 139	i did a mini-overhaul of my CVTC/VVT system about 6 weeks ago. Prior to the work, the car was reluctant to rev beyond 4000rpm. I was running 5w40 to try increase oil pressure but it's effect wore off so hence i decided to overhaul it. This was at 58000km. What i replaced was the o-rings on the camshaft covers, the seal between the cover and timing chain rear case, the VVT filters, one solenoid valve as it was leaking thru the electrical connector. In short, 5w40 will have slightly higher pressure at operating temp. But personally, i'd stick to the handbook recommendations - 5w30. VVT systems are vital to the performance of modern engines and they can be very fussy with oil.