narc

Although i have heard that both Amsoil 5W40 euro. and german made Castrol Syntec 0W30 (M0501) are great oils and that they help reduce piston slap noise i would like to have a poll on which you prefer. I have a bad case of piston slap and i would like to know what you all think is better for it and its noise.

I quess im asking which is better for protection and noise level on a motor with piston slap

1 = Amsoil
2 = Castrol

JayLS1-327

iTrader: (2)

I'm really happy with my Amsoil system 2000 0W-30. It's quiet, and consumption is down. I have not run an analysis.

https://www.amsoil.com/storefront/tso.aspx

tirefryer

My piston slap was really noticable on cold starts and warm restarts with the GC 0W30. I just switched last weekend to the Amsoil 5W40 and on cold start the piston slap is almost totally gone. It is very slight. On warm restarts it is stil noticable but does not do it as long as the GC did. I would highly recomend switching to the Amsoil 5W40 to quiet the motor, plus it has a higher HTHS of 4.2 which will protect better when you are beeting on her.

seabirdak

Come on now Amsoil all the way, it's been proven... but whats up with all the funky number weights?

00T\A

No brainer Amsoil

mr2guru

iTrader: (16)

Amsoil>*

TJ

iTrader: (10)

i voted castrol, its what i use in my Z.
good things about 5w40 mobil 1. i use it in my HD. changed over from havoline dino oil and there is absolutely no valvetrain noise on startup, or piston slap on my 6.0.
i think i will be using the 5w40 mobil 1 in the car if i cant find the 0w30 castrol.

narc

sounds like amsoil 5W40 is the way to go huh..where can i find it and how many qts are you guys running (5.5?)

narc

i figure id run 6 qts of amsoil 5(or 10?which one?)W40 and a longer Acdelco PF-49 filter

sound right? now where to get Amsoil? can i get it locally?

tirefryer

You can get it from the sponsors. Or just order it off there web site you get the same price. I would go with the 5W40 as i did, but i do get cold winters here. If the car was never going to see cold temps. I would run the 10W40. Also use the longer K&N filter HP2006, it is a better filter and it flows much better than the AC Delco. And run 6 quarts with the longer filter.

Tranzor

If you PM me with your zip code and the quantity you want (6 quarts, 1 case, etc) I can give you a price quote. I'm an independent Amsoil dealer and I give the best price I possibly can for fellow LS1TECH members... price is discounted enough that I can't advertise it openly, so PMs or emails only.

Jason

87gnx

iTrader: (3)

Amsoil without a doubt!! Read some on my web site at www.synthetic-oil-tech.com/1262175.Your welcome to purchase there also.
Thanks; Randy

ssracer8

iTrader: (5)

I've always had good luck with Amsoil.

SS101

iTrader: (2)

y 5W40 and not 0W30 or some such closer to OEM spec viscosity???

TXZ28LS1

iTrader: (5)

im running the CASTROL SYNTEC 5W-40!! it kicks ***!! no oil consumption, good oil pressure!! also my buddy said that the oil looked brand new when i changed it at a 4k interval!! good stuff!!

camaro_rs350

iTrader: (3)

AMS oil fo sho

pdd

iTrader: (3)

sweet 60's camaro ssracer

rk_2000_Z/28

iTrader: (3)

I voted for Amsoil (even though I use Royal Purple)

Here is an interesting thread for you to read

http://www.moddedmustangs.com/forums...ight=synthetic

Be sure and read the link in the second post if you have time. That's what I found interesting.

COD02SS

Very good read with both links. I'm a RP groupie tho

GMmexican

iTrader: (7)

Im about to do an oil change im going to try gc 0w-30....and see how it goes ive used only royal purple before