Recent Topics
NAPA Gold oil filters 7060
by ZiTS
8 minutes 16 seconds ago
Collection of VOAs and UOAs
by dccode
26 minutes 17 seconds ago
Monopoly and Innovative
by HTSS_TR
26 minutes 40 seconds ago
Vintage in House Gas Incinerator
by Brybo86
59 minutes 48 seconds ago
2014 f150 5.0 5w20 pup 7200 miles
by robo339
Today at 02:34 PM
Tuff Torq K46 oil question
by BrianF
Today at 02:21 PM
Collection of VOAs and UOAs
by dccode
Today at 02:00 PM
Fram Ultra XG8A 6800 miles [Cut Open]
by Run
Today at 01:01 PM
Floor jack question
by Donald
Today at 12:51 PM
Philosophy Behind Extended Euro OCIs
by camrydriver111
Today at 12:25 PM
Fuel Economy with Mobil 1 Extended Perfomance
by wolf_06
Today at 12:13 PM
Anybody into Motocross?
by VeeDubb
Today at 11:36 AM
Newest Members
DALpilotMike, Safetyfirst, rwood, USARMOR, GV00
58943 Registered Users
Who's Online
92 registered (4WD, AIRJAC3, 2004tdigls, Alex_V, Atesz792, 9 invisible), 1750 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58943 Members
66 Forums
253677 Topics
4164495 Posts

Max Online: 2862 @ 07/07/14 03:10 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: 46992
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