Recent Topics
Accord door lock issue....
by gregk24
07/31/16 12:26 AM
2000 Corolla vvt-i rattle on startup?
by 55Test
07/30/16 11:24 PM
Brought home a beater today
by exranger06
07/30/16 11:03 PM
Can someone explain to me the nomenclature of ammo
by Vern_in_IL
07/30/16 10:52 PM
Common for bad shift solenoids to shift good warm?
by DemoFly
07/30/16 09:50 PM
Riding mower with non bearing front wheels
by JHZR2
07/30/16 09:17 PM
Mail popup
by Eddie
07/30/16 09:05 PM
Tundra headlight restoration..
by kenwin30
07/30/16 09:00 PM
High mileage and severe service...
by OneEyeJack
07/30/16 08:44 PM
Who uses Quicksilver Multi-purpose oil
by BrocLuno
07/30/16 08:07 PM
Gumout Q&A with Ryan Tuerck - Answers
by wwillson
07/30/16 07:37 PM
Friend Picked Up New 2017 Hyundai Santa Fe Today
by crazyoildude
07/30/16 07:07 PM
Newest Members
danthemann, rodder98, kenb777, Indyfan3, RM53119
58651 Registered Users
Who's Online
42 registered (addyguy, Analyzer, aquariuscsm, Anduril, alan003, 5 invisible), 1204 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58651 Members
66 Forums
252471 Topics
4140874 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: 46981
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