Articles
   
       
       
Pics/Video
   
       
       
Shop
Search
 
 
 
 
 
Home   Articles   Pics/Video   Gear   Wake 101   Events   Community   Forums   Classifieds   Contests   Shop   Search
WAKE WORLD HOME
Email Password
Go Back   WakeWorld > Boats, Accessories & Tow Vehicles

Share 
Reply
 
Thread Tools Display Modes
Old    WakeViolater (wakeviolater)      Join Date: Sep 2004       08-17-2010, 1:53 PM Reply   
I have the owners manual, but it is at home, and I wanted to pick up some oil on my way home to change tonight.

What weight do y'all use?
Old    Jason B (jason_b)      Join Date: Feb 2008       08-17-2010, 2:00 PM Reply   
If you need to ask that you should probably bring it in for service....

fwiw (which is little) I use SAE-40 in the Tundra.
Old    WakeViolater (wakeviolater)      Join Date: Sep 2004       08-17-2010, 2:16 PM Reply   
i have changed oil in many boats. this is a new boat for me, and i want to get the opinion of what people use, especially since this is one of the most popular engines for our sport out there.

my boat is made in america, not japan. tunda oil wont work.
Old    Quen Metzler (Quen)      Join Date: May 2010       08-17-2010, 2:44 PM Reply   
From what I can gather one main concern with the GT-40 regarding oil is zinc content. Our engines are flat tappet and need a certain amount of zinc for protection. I use Rotella 15W-40. Wikipedia lists it as having 1200 ppm. I recommend asking on Planet Nautique and maybe calling Discount Inboard Marine as well. Some dealers/service departments are great but they do not always use the best oil. My old dealer used Napa 40. Please post back your findings.

thanks
Old    Hate N Pain (hatepain)      Join Date: Aug 2006       08-17-2010, 2:51 PM Reply   
I just asked my buddy what he uses on his which is just shy of 1000 hours. He uses Valvoline straight 40 weight changed every 50 hours.
Old    Stan Tanner (sbt3)      Join Date: Jun 2002       08-17-2010, 3:06 PM Reply   
straight 40 weight is tough to find. I've been using Mobil 15W-40 delvac diesel oil in mine since I've got it and have about 450 hours using that oil, no problems so far.
Old    WakeViolater (wakeviolater)      Join Date: Sep 2004       08-17-2010, 3:40 PM Reply   
i heard about using diesel oil in boat engines. lots of people do this?
Old    Harold Hemming (h20king)      Join Date: Dec 2009       08-17-2010, 3:41 PM Reply   
valvoline racing strait 40 weight
Old    Hayes (hayes)      Join Date: Aug 2007       08-17-2010, 3:58 PM Reply   
Mobil1 15-50. It has the Zinc additives.
Old    Harold Hemming (h20king)      Join Date: Dec 2009       08-17-2010, 4:00 PM Reply   
valvoline racing has zinc additives as well
Old    Tony Medaglia (h2ohangtime)      Join Date: Aug 2002       08-17-2010, 6:12 PM Reply   
Pennzoil Marine 40W in my 2002 SAN.
Old    Mase (superair502)      Join Date: Mar 2010       08-17-2010, 7:44 PM Reply   
Rotella t 15 40
Old    Trey (nautique830)      Join Date: Jul 2010       08-17-2010, 8:27 PM Reply   
+1 for 15W-40. I run this in my gt-40.
Old    Dan (texastbird)      Join Date: May 2003       08-18-2010, 5:41 AM Reply   
I use Mobil1 10W30 in my '02
Old    Quen Metzler (Quen)      Join Date: May 2010       08-18-2010, 8:03 AM Reply   
The Rotella t 15W 40 is a diesel oil...
Old    Trace (trace)      Join Date: Feb 2002       08-18-2010, 9:06 AM Reply   
Rotella 15W-40 here too, although mine is an Indmar / SBC block. I also run Rotella in my 4-stroke motorcycles. It's a great oil, especially for the price.
Old    Jason B (jason_b)      Join Date: Feb 2008       08-18-2010, 9:24 AM Reply   
Quote:
Originally Posted by wakeviolater View Post
i have changed oil in many boats. this is a new boat for me, and i want to get the opinion of what people use, especially since this is one of the most popular engines for our sport out there.

my boat is made in america, not japan. tunda oil wont work.
I was thinking you were speaking of a Ford GT-40. lol, my bad.

ps. It doesn't make a difference WHERE your boat is made, same oil will work just fine. You're not talking about some crazy, super modified race engine with specific, demanding needs.
Old    Cory D (cadunkle)      Join Date: Jul 2009       08-18-2010, 12:14 PM Reply   
Quote:
Originally Posted by Quen View Post
From what I can gather one main concern with the GT-40 regarding oil is zinc content. Our engines are flat tappet and need a certain amount of zinc for protection. I use Rotella 15W-40. Wikipedia lists it as having 1200 ppm.
This is incorrect. Rotella used to be high in zinc and sulphur, two critical components for flat tappet cams. The zinc cushions and protects from metal on metal content, the sulphur enables the zinc to do its job and carries it. Rotella ever since a couple years ago when they changed to the new design on the bottle is low zinc and sulphur.

I used to break in new engines with Rotella, no cam additive. Never had a problem over tens of engines built. Remember breaking in a 302 I picked up some Rotella and thought it was odd that the bottle looked different, but checked and it was the same stuff according to the bottle. Well, on breakin I wiped the cam. That's the first and only cam I've ever wiped. Moral of the story, if you want high zinc/phos avoid Rotella, it isn't the good oil it used to be.

I use Valvoline Racing VR1 for engine breakin. IIRC it's 1300/1200 phos/zinc. Should be fine on it's own but I use cam breaking additive with it. Mobil1 is another good one on Zinc/Phos but only in a couple grades of their oil. It's not well suited to cam or ring breakin though. Amsoil is another goodie, but again only in some grades. I have charts for Amsoil, Mobil1 and Valvoline I'll try to dig up.

Bottom line is in your boat it doesn't matter what oil you use as it's already broken in. Cams don't just go flat, they fail at breakin or fail due to a stuck lifter not rotating, excess valve lash, and various other wear or improper maintenance issue. Personally after breakin with VR1 I use either VR1 or regular Valvoline (depending on engine HP and use) and then switch to Mobil1 after I'm certain the rings are seated and engine is fully broken in.

Bottom line, that engine is well broken in by now, use whatever you want. Personally I would run Valvoline 10w40 with a Purolator PL30001 filter and change it every 50 hours or sooner if it gets dirty.
Old    Trace (trace)      Join Date: Feb 2002       08-18-2010, 12:24 PM Reply   
Great input, Cory.

Filter choice is a huge!!! Avoid Fram & Pennzoil filters. Purolator, Delco, Motorcraft, and Wix are good brands. http://minimopar.knizefamily.net/oilfilters/index.html

I'm not sure we can say "use whatever you want" - marinizers always recommend higher weight oils. 10W40 is the lightest I'd consider.
Old    Trey (nautique830)      Join Date: Jul 2010       08-19-2010, 5:38 AM Reply   
Quote:
The Rotella t 15W 40 is a diesel oil...
Its approved for both diesel & gasoline engines.
Old    Sam Rubin (cibolasam)      Join Date: Jun 2010       08-19-2010, 5:16 PM Reply   
Valvoline 20w50.VR1. High zinc content which the GT-40 needs.

Reply
Share 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



All times are GMT -7. The time now is 5:28 AM.

Home   Articles   Pics/Video   Gear   Wake 101   Events   Community   Forums   Classifieds   Contests   Shop   Search
Wake World Home

 

© 2012 eWake, Inc.    
Advertise    |    Contact    |    Terms of Use    |    Privacy Policy    |    Report Abuse    |    Conduct    |    About Us