Increased Valve Noise After Change To Amsoil

Holliday · 08-29-2010, 11:41 AM

Quote:

Originally Posted by iwasgointo

Just yesterday morning (Saturday), I changed the oil of my 2009 370Z using the Amsoil top of the line Signature Series oil. The weight is 0w30 which is what Amsoil recommends for this engine. The car has 7800 miles on it. I drove it around for a short time and everything seemed fine.

Well, today I got up early and drove 32 miles to an excellent twisty road that's about 8 miles long and a favorite of motorcyclists. After doing one pass where the car is kept mostly in 3rd gear and the rpm's stay in the 4 to 5k range, I pulled over and popped the hood and noticed a louder than usual valve clicking noise. I then stepped back next to the drivers doors and the clicking was even louder.

I then did another pass on the twisty road and headed home. When I got home the car sounded normal and a couple of hours later I started the car and everything seemed fine.

I know the Amsoil is a very thin oil, but is supposed to offer superb protection against wear at any speed.

I like to drive like this every now and then and I wonder if I should add a viscosity increasing additive such as STP? My thought is the Amsoil is a bit too thin for this particular engine.

I am no expert, but IMO you should be fine with the oil you have now. I would personally not use any additives to the oil. If you are concerned with the valve noise you might use 5W30 on your next oil change. I am sure you will get plenty of comments to make your decision. Good luck!

ImportConvert · 08-29-2010, 10:09 PM

Quote:

Originally Posted by Holliday

I am no expert, but IMO you should be fine with the oil you have now. I would personally not use any additives to the oil. If you are concerned with the valve noise you might use 5W30 on your next oil change. I am sure you will get plenty of comments to make your decision. Good luck!

What is the cSt of the oil at 40 and 100* Celcius. Just because it is 0-30 instead of 5-30 does NOT mean it is thinner.

Holliday · 08-29-2010, 11:15 PM

Quote:

Originally Posted by ImportConvert

What is the cSt of the oil at 40 and 100* Celcius. Just because it is 0-30 instead of 5-30 does NOT mean it is thinner.

That is very true about viscosity. I believe the OP was referring to the webpage on their recommendation for the 0W30. You should always choose the oil best for your local temps and driving habits. 0W30 in California this time a year might be to thin? They also list two different types of 5W30 you can use. Here are the properties for each oil:

Every oil for our 370Z
AMSOIL Product Recommendations - 2010%7cNISSAN%2fDATSUN%7c370Z%7cM

Signature Series 0W-30 100% Synthetic Motor Oil
http://www.amsoil.com/storefront/sso.aspx

SAE 5W-30 100% Synthetic Motor Oil
http://www.amsoil.com/storefront/asl.aspx

Extended Life 5W-30 Synthetic Motor Oil (XLF)
http://www.amsoil.com/storefront/xlf.aspx]AMSOIL

ImportConvert · 08-29-2010, 11:28 PM

Quote:

Originally Posted by Holliday

That is very true about viscosity. I believe the OP was referring to the webpage on their recommendation for the 0W30. You should always choose the oil best for your local temps and driving habits. 0W30 in California this time a year might be to thin? They also list two different types of 5W30 you can use. Here are the properties for each oil:

Every oil for our 370Z
AMSOIL Product Recommendations - 2010%7cNISSAN%2fDATSUN%7c370Z%7cM

Signature Series 0W-30 100% Synthetic Motor Oil
AMSOIL - Signature Series 0W-30 100% Synthetic Motor Oil (SSO)

SAE 5W-30 100% Synthetic Motor Oil
AMSOIL - 100% Synthetic 5W-30 Motor Oil (ASL)

Extended Life 5W-30 Synthetic Motor Oil (XLF)
AMSOIL]AMSOIL.com HTTP 404 Error

I run 0-30GermanCastrol in every car I have owned (except a 5.0 with a built (H/C/carb-conversion) engine with trouble that I never diagnosed (compression even, etc.), which DRANK oil, I ran 15-40 Rotella T in that. Horrible.)

In my LS1, it cut consumption vs. 5-30 Mobil one from 1qt/2500mi to 3/4qt 4500mi.

0-30GC is thicker than any 5/30 out there that I am aware of other than the other true group IV's like AMsoil and Redline, which I am not familiar with their ratings as I have not used them.

iwasgointo · 08-30-2010, 07:35 PM

Quote:

Originally Posted by Holliday

That is very true about viscosity. I believe the OP was referring to the webpage on their recommendation for the 0W30. You should always choose the oil best for your local temps and driving habits. 0W30 in California this time a year might be to thin? They also list two different types of 5W30 you can use. Here are the properties for each oil:

Every oil for our 370Z
AMSOIL Product Recommendations - 2010%7cNISSAN%2fDATSUN%7c370Z%7cM

Signature Series 0W-30 100% Synthetic Motor Oil
AMSOIL - Signature Series 0W-30 100% Synthetic Motor Oil (SSO)

SAE 5W-30 100% Synthetic Motor Oil
AMSOIL - 100% Synthetic 5W-30 Motor Oil (ASL)

Extended Life 5W-30 Synthetic Motor Oil (XLF)
AMSOIL]AMSOIL.com HTTP 404 Error

Good point. I intend to continue using AMSOIL, but I will try a different viscosity for my next change.

I was thinking of trying the European spec oil they offer, but I wonder if this engine can tolerate a 5w40 oil?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Synthetic Oil for 370z; Amsoil?	09370z	Engine & Drivetrain	69	04-18-2012 05:19 AM
Blow-off valve	Unforgotten	Engine & Drivetrain	77	06-10-2010 06:22 PM
Valve Adjustment	370zFORme!!	Engine & Drivetrain	34	04-22-2010 02:21 AM
In the process of becoming an Amsoil dealer, looking to gauge interest of the forum	LiquidZ	Engine & Drivetrain	6	10-07-2009 06:59 AM
Does increased Power increase Efficiency?	Forrest	Engine & Drivetrain	12	05-26-2009 05:22 AM