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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re:


No worries, the 5W30 and 5W40 are almost identical anyway, the W40 is just a bit thicker oil and has a bit higher temperature tolerance. It's also available in the Castrol Edge range.

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28/Nov/2011, 9:19 am Link to this post Send Private Message MSN Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6115
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Re: Best oil to use - synthetic or mineral ?


That's the point...as Cam pointed out, our chain tensioner is a hydraulic one with spring-assist at low revs and since the 5W30 oil gets thinner at higher temps then chances are there will not be enough pressure to keep the tensioner tight enough allowing the chain to rattle.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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28/Nov/2011, 2:21 pm Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Kev,

There is a difference between 5W40 and 10W50 which Cam was recommending and I wouldn't go with an oil that thick which basically means the engine will strugle to move this thick oil around its components.

The 5W30 is more than enough to do the job as recommended in the service manual and the oil supplier website (for our engine) and the days where the tempreature reaches over 30 degrees are rare, so you can switch to the thicker oil in summer if you think your timing chain is making noises because of it, but I reckon it is making noises for other reasons!

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28/Nov/2011, 2:26 pm Link to this post Send Private Message MSN Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6115
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Re: Best oil to use - synthetic or mineral ?


There are many posts in forums about the QR25DE in the Sentras experiencing timing chain rattle on startup for anything from a few seconds to around 30secs and the culprit always seems to be that the oil used does not have the correct viscosity for the tensioner.
Some have noted that the spring in the tensioner was broken and hence not doing its job at idle or startup until the oil pressure was sufficient to take over.

Just seems that there is more to selecting the correct oil for the QR25DE than we all first thought.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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29/Nov/2011, 12:22 pm Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re:


Again Kev, I doubt that the oil is the curlpit with the timing chain tensioner going bust, it has been proven that the T30 tensioner can simply fail due to it being a defective part that can stop working and cause the timing chain rattle/noise.

We have not selected the 5W30 oil just because it was cheap (which it isn't), we based it on the recommendation from the user manual and the oil manufacturers website for Australian conditions.

Surely you don't expect us to use the same grade oil and viscosity like the one the Sentra guys are using in the US where they have snow and freezing conditions?

Has your dealer ever complained or told you that you are supplying the wrong type/grade of oil? I know mine didn't and they even confirmed it was the correct grade.

Last edited by jalalski, 29/Nov/2011, 12:35 pm


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29/Nov/2011, 12:34 pm Link to this post Send Private Message MSN Blog
 
Munners96 Profile
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X-TRAIL ENTHUSIAST
 


Date Registered: 04-2009
Location: Northern Beaches, Sydney
TOTAL POSTS: 101
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Re:


I'm pretty sure I'm experiencing timing chain rattle on startup for about 2-3secs. And thats using 5W30.

So imagine a more viscous oil would make this worse (at cold startup)

Note: experienced this since I bought the car with 60k on it so don't know what oil was used before). I think the previous owner used what ever the Nissan Dealers put in.

Last edited by Munners96, 30/Nov/2011, 4:57 pm


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2005 Ti-L Man Black
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30/Nov/2011, 4:54 pm Link to this post Send Email PM   Send Private Message
 
ironbark Profile
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Date Registered: 01-2012
TOTAL POSTS: 67
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Re: Best oil to use - synthetic or mineral ?


Hi.
I just had my 1000 klm service done yesterday, at 1500 klms. On pick up, I asked my dealer service advisor which oil they use so I can purchase some to top up if necessary, and (I never told him this), if I decide to do an oil change myself between regular changes.

He told me they use Valvoline Durablend in my X'ey. {2011 Sept build petrol}.

He rang me this morning and told me he made a mistake thinking my vehicle was diesel? I told him it was petrol yesterday?? He said they use a special Nissan engine oil that one cannot buy comercially unless one buys it in 20 litre drums. He suggested I could buy a couple of litres for top up of him if I supply my own container? Whats with that?

I have been doing my own servicing on my 2005 X Trail, which I still have, since new and have had no problems using Shell Helix 15-50. I'm not suggesting this is the oil for the new model but whats the secret with this Nissan special oil story these days?
Please dont get me wrong. I am quite happy to have the dealer to do the servicing on my new X Trail.

Cheers,

Last edited by ironbark, 7/Mar/2012, 1:49 pm
7/Mar/2012, 1:28 pm Link to this post Send Private Message
 
jacksback Profile
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Date Registered: 05-2011
TOTAL POSTS: 16
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Re: Best oil to use - synthetic or mineral ?


Just from my experience, read a post regarding timing chain noise which mentioned that only mineral oil should be used, I think refering to older engines and chain tensioner problems. I was using Penrite 5/40 Full synthetic and had timing chain clatter very soon after startup. Changed over to Nulon 20/50 mineral which is thicker but within recommended temp. range as per handbook for my location, and have no clatter until about 15-20 mins of driving. Currently in process of replacing chain tensioner to see if can eliminate noise alltogether. The old saying of "If it ain't broke don't fix it" may apply as well. If you are using Synthetic and have no timing chain noise, then keep using it.
29/Jul/2012, 7:11 pm Link to this post Send Email PM   Send Private Message Blog
 
xr5turbo Profile
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Date Registered: 07-2013
Location: Dee Why
TOTAL POSTS: 34
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Re: Best oil to use - synthetic or mineral ?


Has anyone got any thoughts on running a really thick oil on a high km/s T30? When I mean thick, I mean really thick, I have just for the last month been running Penrite 25w70. A mineral oil specifically marketed for high km/oil consumption motors.

Having only owned the T30 for 6 months now I was unaware of the issues with it surrounding high oil consumption. I initially used 5w30 and the old girl was drinking it like a fish, check cat and butterfly screws all looked good, compression is good, although I am certain head gasket has been done.

The T30 goes well otherwise, has done 225k km, doesn't smoke, no leaks. I have noticed that when i switched to 25w70 the motor really runs nicely, it's quiet and responsive, no noticeable change in fuel economy, average just over 500km per tank and importantly oil consumption is now very minimal to non existent. My only concern is running this thick oil in Winter (albeit Sydney with fairly mild temps), having said that what have i got to lose, the motor is probably well due for a rebuild, 25w70 seems to be buying me time quite nicely.

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MY05 Subaru Forester XT with MRT XA kit.
20/Feb/2014, 8:24 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6115
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Re: Best oil to use - synthetic or mineral ?


If that oil is doing nicely for you in summer then just change to a slightly lower viscosity for winter if it concerns you. I would imagine you'll have starting problems as an indication it is getting sluggish with the cold and that could signal the change. An oil change every 6 mths between viscosities won't hurt I wouldn't expect.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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28/Feb/2014, 8:45 pm Link to this post Send Email PM   Send Private Message Blog
 


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