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fastjeff
#1 Posted : Thursday, November 04, 2010 11:34:58 PM(UTC)
fastjeff

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An astute poster at another marine site did some excellent research on oils, and this was the result:

....I contacted both Crusader and Shell and here are their responses. Based on this I thinking about switching to the Rotella 15W40 from the straight 30W. Any potential downsides to this?

Crusader:

We do recommend 15w40 weight oil in all applications now. This is a heavy duty oil and is suited for your engine.

Shell:

All of our Rotella oils still contain ZDDP. The highest levels are in our multigrade oils, 10w-30,10w-40, 15w-40 and 5w-40 synthetic.

Regards,

Shell Technical


(Note: Newer engines--except diesels--all use roller tappets, which do not require the ZDDP additive. Older motors with flat tappets do. The morons at the EPA removed the ZDDP since it adds a tiny bit of unwanted emissions. Thanks again, Federal Morons!)

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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Capt. Chad
#2 Posted : Friday, November 05, 2010 12:03:08 AM(UTC)
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Jeff, I can't remember where I was told this but doesn't Rotella promote sludge build up in gasoline motors?

The reason I say this is that I thought that if it was good enough for our diesel trucks then why wouldn't it be the ticket in our workboats. So I used it for a season in our 26' Mako with two 5.7L crusaders. I was then told that Rotella should not be used in gasoline engines.

If Rotella wont hurt my gas inboards then I would love to go back to it. I can start ordering 55g drums from Land n Sea and just feed the stuff to everything but the 2 strokes.
1981 32' Sedan Fly Bridge
440 ci 330hp (2)
7.5 kw Kohler
"International Harbor Marina"
Friendsville TN, TN River
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dougrose
#3 Posted : Friday, November 05, 2010 4:43:14 AM(UTC)
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I am under the impression that gas engines and diesel engines need different oils because of the different additives, so I use the 15-40 for diesels. I thought most diesels had roller tappets, all the ones I own do, but I am not familiar with the various automotive diesels. My Mustang 302 has flat tappets, and I follow the recommendations (no diesel oil!). The KrautVagen is diesel (sort of) and uses Mobil 1, but that's Germans, they might have picked it for the cost.

In Thailand they take the drained crankcase oil, run it through a filter, and then use it in 2-stroke motors. I think this accounts for a lot of the smog that Bangkok is famous for. So I'm not recommending it.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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tundrarules
#4 Posted : Friday, November 05, 2010 9:14:24 AM(UTC)
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This oil discussion is beginning to sound like "Who are you voting for President?" Eh?

Why can't there be a clear answer to everything in life? d'oh!

Running 10w-40 auto zone oil until this is hammered out. Think
1985 Marinette 29 Sedan bridge
Twin 318s, 660 hours
New Edelbrock 1409 carbs (working like a charm)
Original Electronic Ignition, Blaster 2 coils, 90 deg plug wire universal kit cut to fit
Raw water system
Freshwater always
Located Pickwick Lake, TN,MS,AL

RETRO BOATS ARE COOL

If the guys on this forum take their time to help you, have the courtesy to update your thread with the resolution.
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fastjeff
#5 Posted : Friday, November 05, 2010 10:40:11 AM(UTC)
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I've never heard that "Rotella promotes sludge", nor have I seen this in mine (going on three years now). I'm sold on it.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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Capt T
#6 Posted : Friday, November 05, 2010 11:54:20 AM(UTC)
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Hey Chad ask Rick what he thinks about it. you'll get quite the education. At least I did this last week.
1978 Aft Cabin
Twin Chrysler 440's
Fox Road Marina

My Father once told me "if you ever need a helping hand, just look to the end of your arm!"
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cap'n Brent
#7 Posted : Wednesday, November 17, 2010 8:45:41 AM(UTC)
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Here's my 2 cents I was told the multi viscosity oil You need a cold in a hot temperature to work properly Our marine moto rs don't get hot enough to warrant needing a multi task of the oil I run rotella 15 40 and have seen no troubles I like the stuff
HP Chadwick bay Sunset Bay lake Erie NY boat name Sunrise 32' f/b fisherman chry 318 twin blue bastards,28'express singel 318
"It would be a labor of love, if I loved to labor" cpt Brent
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Barkleydave
#8 Posted : Wednesday, November 17, 2010 10:55:55 AM(UTC)
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I have used Rotella for years in M boats. No problems..

I change the oil in the fall run the boat 50 hrs and change the oil.

Do not change oil and it will turn into sludge.

Now I do run Mobil 1 in my 57 MGA but I only drive it a couple of hundred miles per year so it sits a lot in a controlled environment so the oil always looks new.

Engine components like clean oil no matter what you decide to use.

dave
None
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collins69s
#9 Posted : Wednesday, November 17, 2010 11:38:59 AM(UTC)
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I thought that multi viscosity oils worked like this: When your engine is cold and when the temps outside are colder, the 15-40 would be 15 weight(light) when starting up and after the engine temp increases the oil "weight" increases to 40 weight. The main benefit from this being that during start up there is less chance for metal-on-metal, since if you ran a straight 40w or 50w the engine would be running for a while without proper oil circulation because the oil is so thick because it isn't warmed up.. Capiche?
Sean
SIFF SURF
1972 32' FB Express
Twin 318s
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Neal Weatherman
#10 Posted : Thursday, November 18, 2010 5:20:03 AM(UTC)
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I have run Rotella 15/40 in everything for quite a while now. I like the stuff...
Neal
1965 26' Convertable, single screw, new 230 Hp Mercruiser w/ closed loop cooling, installed 1995, all systems upgraded 2004 to present.
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Domino
#11 Posted : Thursday, November 18, 2010 9:47:58 AM(UTC)
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I use Shell Rorella 30W..............used 30W since I bought the Domio 11 years ago......previous owner used 30W for 8 years.....
Domino is on the hard @ Pier 500 Marina, Wyandotte, Michigan
** 67 32' Express
** Ford 302's
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RiverRatt
#12 Posted : Friday, November 19, 2010 10:12:41 AM(UTC)
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Here is my two cents worth. I work at a Mack Truck dealership. We used to use our bulk oil for service and all our vehicles (boats too). We used to use Rotella T 15W40 we changed in about 2004 to Chevron Delo 15W40 (We get a better price the Delo was branded "Bulldog oil"). In our company vehicles we have are gas pickup trucks that run 300-400 miles a day. We had a 90's S-10 with a 2.8L engine that ran over 400K miles. Never had any internal engine work done on it. Our last parts truck we updated was a Dodge 1500 with a 4.7L V8 had 340K miles on it, no engine work. The transmission was going out. We used our bulk 15W40 on both of those vehicles.

Currently we are using the spec oil in our new Ford. It recommends 5W20. It may be for fuel economy, we are getting almost 2-3MPG better than the Dodge. The Ford 1/2 Ton with a 4.6L V8 6spd Auto is getting 20-21MPG highway. The Dodge 1/2 ton 4.7V8 4 spd auto 17-18 MPG.

The new heavy duty Mack Trucks are recommending 10W30 diesel oil and OK to use 15W40. I also think this is for fuel economy. How much difference? I do not know.

I use 15W40 Delo in my boats it is what I have. I think Shell maybe better. I think any quality brand Diesel spec oil is better than plain oils. The diesel oil have more additives that cost more to put in that help the life of the oils and reduce soot and acid build up. I have never seen sludge in any of our vehicles.
"The is no dumb-ass vaccine" - Jimmy Buffet
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fastjeff
#13 Posted : Friday, November 19, 2010 8:56:33 PM(UTC)
fastjeff

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Excellent report! Nothing like real world experience.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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collins69s
#14 Posted : Saturday, November 20, 2010 9:22:33 AM(UTC)
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Hmm.. Diesel oil, huh? Interesting..
Sean
SIFF SURF
1972 32' FB Express
Twin 318s
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shamrock
#15 Posted : Saturday, November 20, 2010 10:45:31 AM(UTC)
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The previous owner used Shell Rotella Oil in my M. I have been thinking of trying, Full Synthetic or synthetic blend? With a little over 1000 hrs on the Volvo’s I am not sure if it is smart to spend extra for synthetic?
1981 37 Sedan Bridge
Twin 185hp Volvo diesels, Props 19X19 four blade
Twin 150 Galion fuel tanks, Twin 50 Galion water tanks
7.7KW Westerbeke diesel generator
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cap'n Brent
#16 Posted : Saturday, November 20, 2010 6:08:21 PM(UTC)
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Shamrock unless you put mega hrs on your powerplants I think synthetic is a waist I did an in frame on my detroit at 900,000 the berings looked fine have over 1milion since and my fingers are crossed every trip the big difference I see is my rig doesn't shut off not many cold starts on my boat alot of them but I think clean oil is the trick not supper refined high dollar oil
HP Chadwick bay Sunset Bay lake Erie NY boat name Sunrise 32' f/b fisherman chry 318 twin blue bastards,28'express singel 318
"It would be a labor of love, if I loved to labor" cpt Brent
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Docsnow
#17 Posted : Saturday, November 20, 2010 9:15:08 PM(UTC)
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cap'n Brent wrote:
I think clean oil is the trick not supper refined high dollar oil

Brent,

But isn’t the word on those Detroit’s Think when U guys pull in the truck stops "fill the oil & check the fuel tanks". d'oh! So them Detroit’s always have fresh clean oil in them Dancing

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 You'll have bad times, but they'll just wake you up to the good times you weren't paying attention to

Some people try to turn back their odometers.Not me, I want people to know "why" I look this way.I've traveled a long way and some of the roads weren't paved.
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cap'n Brent
#18 Posted : Monday, November 22, 2010 12:21:28 AM(UTC)
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I've also own a harly and my answer to that is they don’t leak they are marking their territory
HP Chadwick bay Sunset Bay lake Erie NY boat name Sunrise 32' f/b fisherman chry 318 twin blue bastards,28'express singel 318
"It would be a labor of love, if I loved to labor" cpt Brent
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Docsnow
#19 Posted : Monday, November 22, 2010 3:02:59 AM(UTC)
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To Funny Dancing Brent. So them Hogs P on fire Hydrant too Think

Norm,

Big BigMs Live On Applause
http://www.picturetrail.com/gid23690601 Try it now there's music to listen to while U view the Big M's

http://www.PictureTrail..../index.php?clubID=20726 this one for the Pix club


 You'll have bad times, but they'll just wake you up to the good times you weren't paying attention to

Some people try to turn back their odometers.Not me, I want people to know "why" I look this way.I've traveled a long way and some of the roads weren't paved.
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