Recent Topics
Issues with simple mp3/wma player.
by mrsilv04
18 minutes 9 seconds ago
Finally installed Lifeliner GLS on the Focus
by Miller88
Today at 08:42 AM
My PYB expierence
by Georgiaboy2109
Today at 08:24 AM
Any GM L-76 (LS-X variant) V8 owners out there?
by SuperEd73
Today at 07:52 AM
THE BATHTUB TEST
by Charlie1935
Today at 07:15 AM
My First OC in my 2006 Volvo XC90
by Toros
Today at 07:05 AM
Lubegard in p/s pump
by Bob_E
Today at 05:56 AM
How do you say it?
by GreeCguy
Today at 04:24 AM
Oil recommendation
by TIUSER
Today at 04:18 AM
A Slew Of Choices
by Red91
Today at 01:48 AM
Two Shops, One Septic Tank
by Red91
Today at 12:20 AM
Tell me about Saab 9-3 convertibles
by pottymouth
Yesterday at 11:57 PM
Newest Members
loneryder, MNbiker, Amercanzer0, BobCos, rdm101
49632 Registered Users
Who's Online
86 registered (aquariuscsm, ARB1977, 97f150, A_Harman, 2004tdigls, 13 invisible), 1539 Guests and 231 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49632 Members
64 Forums
212145 Topics
3325219 Posts

Max Online: 2605 @ 04/19/14 12:41 PM
Donate to BITOG

Topic Options
#971553 - 08/21/07 10:02 PM Amsoil 4 - Stroke Marine
MacBarry Offline


Registered: 08/18/07
Posts: 2
Loc: Ca.
This is my first post and I have a few questions that you guys can help me with. I am the process of having a new 5.7 Vortec Marine 320 hp carb version installed in my boat. Bolted to a Cobra outdrive. A engine oil cooler has been installed as well.

1. The shop that is doing the install states I should not use synthetic oil during the break in period. As the rings may not seat. But I know the new Corvettes come with synthetic from the factory. Is this a problem?

2. Oil recommendation from the Marine engine company is.
Ambient temp above 50F - API SAE 15-40 SM
Ambient temp below 50F - API SAE 5-30 SM

3. I ordered a case of Amsoil-4-Stroke Marine Synthetic [WCF] SAE 10W-40. I notice it is not SM rated but on the Amsoil site it shows it is ok to use in an I/O. Is this the correct oil to use?

Thanks four comments in advance.

Top
#971554 - 08/21/07 11:09 PM Re: Amsoil 4 - Stroke Marine [Re: MacBarry]
Pablo Offline


Registered: 10/28/02
Posts: 46408
Loc: Duvall WA - Pacific NW USA
1) Don't use a synthetic from the first start is good advice, but it has nothing to do with ring sealing and everything to do with rinsing out the new engine and lines and the expense of the oil.

2 and 3) The 10W-40 will work fine. You don't need an API SM for that application.

Top