View Poll Results: Which is better for noise level and protection for LS1 piston slap

Amsoil 5W40 euro.

48.81%

German Made Castrol Syn. 0W30

51.19%

Voters: 84. You may not vote on this poll

Poll. Amsoil vs. castrol syntec

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Mar 3, 2008 | 07:13 AM

#21

m6speed

Launching!

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From: Maryville, IL

i've used both, didn't like amsoil as it made my valve train even louder so i switched back to german castrol

Mar 3, 2008 | 08:41 AM

#22

TXZ28LS1

TECH Senior Member

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From: Classified

runnin castrol syntec 5w-40!! good stuff!!

Mar 3, 2008 | 07:26 PM

#23

loloone

LS1Tech Editor

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From: NorCal and SoCal

Amsoil baby!

Mar 3, 2008 | 09:02 PM

#24

transAm-98

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From: CA, Bay Area

I was running amsoil on my old motor with H/C and 120k and it really quieted things down and stopped my oil consumption vs mobil 1. Never tried the GC but once I switch my 408 over to synthetic it will be back on a steady diet of Amsoil.

Mar 3, 2008 | 09:05 PM

#25

OMGWTFBODY

TECH Enthusiast

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From: Huntsville, AL

I'm leaning towards giving AMsoil a shot.

I can get it locally for a mere 6.75/qt
As opposed to 6.25/qt

I gotta get rid of the 2.5 gallons of GC I've accumulated first.

Mar 3, 2008 | 09:31 PM

#26

david vericker

TECH Regular

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From: Mi

Amsoil 0W 30 sever duty.

Mar 3, 2008 | 09:52 PM

#27

NHRAMAN

TECH Senior Member

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From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*

I grew up with Castrol.

Mar 3, 2008 | 09:54 PM

#28

Eatinstang4life

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From: cincy ohio

Again!!!!!?????

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Mar 4, 2008 | 01:56 PM

#29

pnascar75

Registered User

Joined: Mar 2008

Posts: 2

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Well if yall are needing AMSOIL dealer I am one. www.lubedealer.com/poynors. You can also contact me from the information on my site. Thank you and hope to hear from yall that are looking to having a better running vehicle what ever the type it is.

Kelly Poynor
Poynor's Motor Supplies
Authorized AMSOIL Dealer
www.lubedealer.com/poynors
ZO # 2014205
509-554-3856

Mar 4, 2008 | 02:50 PM

#30

LS1-450

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I haven't read through all of the posts, but, UOA's have shown good wear performance for both "green" 0W-30 German Castrol & 5W-40 AMSOIL. Once I run out of my green stash, will be changing to AMSOIL. Voted for Castrol because of the green 0W-30. Mfg. has long since stopped & AMSOIL is my next equal choice. I also use a Moly additive.

Mar 4, 2008 | 03:00 PM

#31

INMY01TA

11 Second Club

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Joined: Apr 2003

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From: Crofton Md.

German Castrol is good stuff.

Mar 4, 2008 | 03:05 PM

#32

SmokinU

Staging Lane

Joined: Dec 2006

Posts: 87

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From: Kaneohe, Hawaii

I use Castrol SYNTEC not the blended one the full synthetic and it works great.

Mar 4, 2008 | 03:18 PM

#33

LS1crazy01

12 Second Club

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From: ILLINOIS

I tried Amsoil and I didnt like what it did to my car. My engine ate that stuff right up. Plus my ticking got ALOT louder. I switched to GC and it only burns half of a quart to 3/4's of a quart every 3k miles. Versus 1 1/2-2 quarts of the Amsoil.