2007 VQ35HR Engine Oil Analysis
05-08-2009, 06:10 AM
#202
im using castrol syntec 0w-30 and my psi gauge idles a bit above 30 when its warm, and when i gas it the gauge skyrockets, is this normal with this oil? its making me scared to floor it
Last edited by klaze1; 05-08-2009 at 06:13 AM.
05-12-2009, 10:02 AM
#203
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As to why we are using an 0W-30 vs. the 5W-30: German Castrol is a thinner weight at cold temps (before start-up), and so flows easier when cold, giving better protection. After it heats up, it behaves like a thicker 5W would, giving good high temp protection. I got this from Will (Resolute), the oil guru:
Originally Posted by Resolute
Are 0W-xx oils too thin for my engine?
As discussed previously, multi-grade oils are designed to behave like two different oil weights at two different temperatures. Since an oil is thicker with colder temperatures, a lower weight oil flows better, and better protects the engine during start-up since it is easier to pump to critical areas. So, a 0W-xx oil is a better oil for start-up, especially in cold temperatures. When the oil heats up and starts to thin out, it becomes a heavier weight oil just like a 5W-xx or 10W-xx oil would. So, a 0W-xx oil is only a “thinner” oil when it’s cold- where it is a benefit. At operating temperatures, a 0W-30 is the same weight as a 5W or 10W-30, just as a 0W-40 is the same weight as a 15W-40, etc... Therefore, 0W-xx oils tend to be better suited for year-round use in any climate, since they flow better in cold temps but become as thick as any other similar grade oil when hot.
Last edited by KManZ; 05-12-2009 at 10:13 AM.
06-19-2009, 05:44 PM
#205
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From the charts that have been posted, it seems as if Castrol Syntec 5-30 full synthetic is one of the best oils for the Z?
I hope this is true. I went out and bought a tub and filled my car up with it....
I hope this is true. I went out and bought a tub and filled my car up with it....
06-20-2009, 02:14 PM
#206
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I was under the impression from this thread and others that you want the "European" Formula which is Syntec 0w-30 not 5w-30. Post your 5w-30UOA here when you get it.
06-23-2009, 05:45 PM
#207
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Has anyone done any tests on this oil?
http://www.lubricants.elf.com/lub/lu...6?OpenDocument.
It seems to meet the same specs as the Castrol European Blend.
http://www.lubricants.elf.com/lub/lu...6?OpenDocument.
It seems to meet the same specs as the Castrol European Blend.
08-18-2009, 11:58 AM
#208
Resolute,
Can you review my analysis and let me know what you think. I value your opinion more than blackstones.
p.s. most of these miles on the UOA are from my trip to the NC/TN and back from Jerz. At least 1,000 of the miles were driven very hard.
Can you review my analysis and let me know what you think. I value your opinion more than blackstones.
p.s. most of these miles on the UOA are from my trip to the NC/TN and back from Jerz. At least 1,000 of the miles were driven very hard.
Last edited by NyCSnEaK; 08-18-2009 at 11:59 AM.
08-21-2009, 11:35 AM
#209
Will
09-17-2009, 02:56 PM
#211
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have used Castrol GB 0w30 for 12K miles. have now found a new shop and am running Amsoil 0w30 with Amsoil filter... from reading and researching it is a much better Oil, can can notice a difference.
+100000 for Amsoil
+100000 for Amsoil
10-25-2009, 07:00 AM
#214
2nd oil change this week. Car now at 7kmi. Switching upto Amsoil 5w-30 from Mobi1
With a K&N oil filter. I may send the Mobil1 out to be tested.
edit: I requested a test kit. So should be 3-4 weeks turn around I would imagine.
With a K&N oil filter. I may send the Mobil1 out to be tested.
edit: I requested a test kit. So should be 3-4 weeks turn around I would imagine.
Last edited by Lakeside; 10-25-2009 at 07:05 AM.
11-28-2009, 02:34 PM
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viscosity
I have noticed that in my 2003 350Z manual, it calls for the typical 5-30w oils. BUT, it says you CAN use up to a 10-40w oil if your operating within certain temps, etc etc.
bla bla we all know this BUT, I just bought a 2008 model 350Z and noticed that the owners manual calls for 5-30W and does not discuss any deviation at all. there is NO mention of any other weights of oil.
In fact, that standard chart that adorns nearly every owners manual that shows a temp. chart and corresponding oil viscosities is NOT even in the book.
Is the implication to be drawn here that the 07-08 engine requires different oil from the 03-06 models???
Mike
bla bla we all know this BUT, I just bought a 2008 model 350Z and noticed that the owners manual calls for 5-30W and does not discuss any deviation at all. there is NO mention of any other weights of oil.
In fact, that standard chart that adorns nearly every owners manual that shows a temp. chart and corresponding oil viscosities is NOT even in the book.
Is the implication to be drawn here that the 07-08 engine requires different oil from the 03-06 models???
Mike
11-28-2009, 03:05 PM
#216
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I have noticed that in my 2003 350Z manual, it calls for the typical 5-30w oils. BUT, it says you CAN use up to a 10-40w oil if your operating within certain temps, etc etc.
bla bla we all know this BUT, I just bought a 2008 model 350Z and noticed that the owners manual calls for 5-30W and does not discuss any deviation at all. there is NO mention of any other weights of oil.
In fact, that standard chart that adorns nearly every owners manual that shows a temp. chart and corresponding oil viscosities is NOT even in the book.
Is the implication to be drawn here that the 07-08 engine requires different oil from the 03-06 models???
Mike
bla bla we all know this BUT, I just bought a 2008 model 350Z and noticed that the owners manual calls for 5-30W and does not discuss any deviation at all. there is NO mention of any other weights of oil.
In fact, that standard chart that adorns nearly every owners manual that shows a temp. chart and corresponding oil viscosities is NOT even in the book.
Is the implication to be drawn here that the 07-08 engine requires different oil from the 03-06 models???
Mike
My next engine will be built (with clearances of my choice) and I'll be running 15W50 just because I want to run slightly looser bearing clearances. If you really wanted to get analytical you could compare the bearing specs between the DE and HR and see if there is any need to not run heavier, but I personally doubt there is.
11-28-2009, 06:58 PM
#217
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Yea I know from where your coming buddy.
I happen to have bought all the oil the do a change for my 2003 and have to now use it for my 2008. Its Synthetic Motul 300 10w-40.
I only run my car in the summer, dont drive it under 50 degrees so you would think, the 40w would not be a problem but it troubled me a bit not to see it listed as acceptable like it was in the 2003. Mike
I happen to have bought all the oil the do a change for my 2003 and have to now use it for my 2008. Its Synthetic Motul 300 10w-40.
I only run my car in the summer, dont drive it under 50 degrees so you would think, the 40w would not be a problem but it troubled me a bit not to see it listed as acceptable like it was in the 2003. Mike
My general feeling on this, is that the EPA has requested automakers to run different oils in their engines in an attempt to slightly increase efficiency. Heavier weight oils are less efficient in general, so...it sort of makes sense.
My next engine will be built (with clearances of my choice) and I'll be running 15W50 just because I want to run slightly looser bearing clearances. If you really wanted to get analytical you could compare the bearing specs between the DE and HR and see if there is any need to not run heavier, but I personally doubt there is.
My next engine will be built (with clearances of my choice) and I'll be running 15W50 just because I want to run slightly looser bearing clearances. If you really wanted to get analytical you could compare the bearing specs between the DE and HR and see if there is any need to not run heavier, but I personally doubt there is.
08-31-2010, 10:05 PM
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I don't get any of these "oil analysis" tests...
I'd like to figure out what oil is best.
I'd like something readily available, I can buy at Autozone, Kragen / Checkers / O Reilly's
I live in Arizona, it's mostly hot
what should I use during the summer, and the winter?
Thanks
I'd like to figure out what oil is best.
I'd like something readily available, I can buy at Autozone, Kragen / Checkers / O Reilly's
I live in Arizona, it's mostly hot
what should I use during the summer, and the winter?
Thanks