Oil question

mishuko

So... it happened my shop made a boo-boo and used 5w40 instead of 5w30... didn't even realize until I got home. So... What happens if you use 5w40? Will some of the more intricate parts lose lube?

I'm not trying to cheap my way out I was just trying to find some info as I tried searching to no luck.

Any oil guru's provide insight?


ps once spring comes i'm getting the filter and oil changed to 5w30

LostSol

youll be fine.

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mishuko

Thanks for the peace of mind! lol...

Well it's also just been an open book now... I read that the 350 HR's liked the 5w40 over 30 and curious to see if that holds true for the VHR block.

I just want to learn more about cars so please excuse my lack of knowledge in this aspect... I just want to learn more

Wonka2581

Call Z1 and get you some RedLine Oil... Thats what I use and I have had no problems...

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FPenvy

redline is all i've used in my Z. love it

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bvl

Read your owners Manual especially the non-us table regarding oil weights that are supported.

You will then realize the nonsense that is the US recommendation.

- b


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SouthArk370Z

I wouldn't worry about it too much in a DD. It'll be a little thicker than Nissan suggests but shouldn't be a big deal. Personally, I'd drain it and go back to 5W30, just for a little peace of mind.

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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.

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mishuko

I'm in Canada... I was sifting through the pages and didn't find anything which section should I check? I did the back section and then how to change oil section and couldn't find anything other than 5w30 or any table with 'non-us tables'...

It's not even a DD it's a spirited driving machine of fun for the evening/weekends... okay maybe an occasional DD but mostly for the road trips and cruising

It's not like I sit at 6krpm in first for an hour just because lol....


I did notice I burned about a quart over 7000km but it's parked now for the winter... just doing some pondering for spring. I appreciate your insight on experience with your oil use though.

I think I'll go with the general consensus and switch back to 5w30 but I'm also tempted to try this weight oil to see if I notice any difference or not. Atleast I have around 5 months to ponder

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

MJB

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.

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juld0zer

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.

bvl

Apologies I thought it was in the basic manual but checking my PDF its US specific. The service manual however, is world wide

So for North America (and that includes you I know ) its 5w30 only.

Yet for the rest of the world there is this lovely Blurb and chart:

GASOLINE ENGINE • 10W-30 is preferable.
5W-30 is also preferable and will improve fuel economy.
If 10W-30 or 5W-30 is not available, select the viscosity, from the chart, that is suitable for the outside temperature range.

Chart shows you can run 5/40 in the right temp range, even 20/50.

Out of warranty, my choice of year round fill is likely going to be M1 0/40, which is a 'light' 40w with a fantastic add pack for the price.

Under warranty (still is) its been a stead diet of 5/30 full Penn Ultra.

- b