Synthetic Oil this spring

H

headnsouth

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Apr 5, 2007
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25768
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My 98 Chapparal 2135S (250 hrs)has had conventional oil in it from day one but I'm looking into replacing it with synthetic. I normally used a CH 40W in this MERCRUISER (5.7L ALPHA)engine but can't find any oil info in the manuals that I have. It probably just an oversight but I just don't want to put in the wrong oil. What recommended for a boat in Gawja?
Thx
 
IMO...you're going to change oil once a season, yes? Synthetic will do nothing over conventional in this application. It's not that old an engine, it's not hi performance. Get yourself 5 qts of Shell Rotella HD 15-40 and go boating.
 
Well, I was looking to get away from changing the oil every season and maybe go every other if not 2 seasons on an OC.
 
Again...IMO, change oil at end of every season. Removes contaminants before sitting.
 
Moving to a synthetic oil I won't have the contaminants that come with a conventional oil.
hxxp://www.mobiloil.com/USA-English/MotorOil/Synthetics/Whats_It_Do_For_Me.aspx

Mobil 1, introduced in 1974 as one of the first fully synthetic motor oils, again made news in 2002 with its SuperSyn Technology, which helps provide protection under the most extreme use. In 2005, Mobil 1 was joined by Mobil 1 Extended Performance, which is designed for today’s longer service intervals.

Both Mobil 1 and Mobil 1 Extended Performance are fully synthetic motor oils for automotive engines. They are made from a combination of advanced, high-performance fluids, including polyalphaolefins (PAOs), plus a unique proprietary package of additives. Mobil 1, employing SuperSyn technology, and Mobil 1 Extended Performance, with its Advanced SuperSyn System, offer significant advantages over conventional motor oils, such as:

Anti-Wear

Outstanding protection.

Minimizing oil degradation.

All-Temperature

Faster lubrication at start-up in low temperatures.

Excellent protection at high temperatures.

Exceptional resistance to thermal breakdown.

Engine Cleanliness

Outstanding protection against harmful deposits.

Cleaner running engines.

Engine Efficiency

Greater resistance to oil oxidation (thickening), which reduces engine drag.

Lower oil consumption under high-speed conditions.

More efficient engine operation over a wider temperature range.

All motor oils are made up of base oils and additives. In general, fully synthetic motor oils contain non-conventional, high-performance fluids. Synthetic Blends usually use some non-conventional, high-performance fluids in combination with conventional oil. To meet the demanding requirements of today's specifications (and our customers' expectations), Mobil 1 with SuperSyn Technology and Mobil 1 Extended Performance with its Advanced SuperSyn System, use high-performance, engineered fluids, such as polyalphaolefins (PAOs), along with a proprietary system of additives. Each Mobil 1 and Mobil 1 Extended Performance viscosity grade uses a unique combination of synthetic fluids and selected additives in order to tailor the viscosity grade to its specific application.

Exceeding Standards
Mobil 1 formulation is available in six viscosity grades. Additionally, there's Mobil 1 Truck & SUV 5W-30 for hard-working gasoline engines and Mobil 1 Turbo Diesel Truck 5W-40 for hard-working diesel engines.
 
You have my opinion. You're looking for a maintenance shortcut...I don't belive in taking shortcuts with engine maintenance.
 
Agree with Msibley. Fresh oil serves a purpose. "Engine Cleanliness

Outstanding protection against harmful deposits. "

Contaminants will not be from the oil itself, they will be what is introduced into the oil from external sources. In the marine environment, one of the contaminant's may be minute quantities of water. Changing the oil rids the engine of those contaminants. When you see oil getting dirty, it's doing it's job.
 
Taking a shortcut with a superior product that out performs conventional oil? I wouldn't consider it a shortcut but smarter maintenance.
If you could go 12-15k miles with your vehicle using synthetic oil versus 3-5k miles and have all the benefits of a synthetic why would you stay with conventional oil?
 
quote:
Originally posted by KiDa

Agree with Msibley. Fresh oil serves a purpose. "Engine Cleanliness

Outstanding protection against harmful deposits. "

Contaminants will not be from the oil itself, they will be what is introduced into the oil from external sources. In the marine environment, one of the contaminant's may be minute quantities of water. Changing the oil rids the engine of those contaminants. When you see oil getting dirty, it's doing it's job.

Click to expand...

I could see the oil having moisture in it over the lay up but during the season any moisture would burn off. But you do have me wondering so I'll have to ask the folks over at the mobil1 site.
 
From the FWIW Department. The guys at the mobil1 site are trying to sell you Mobil1. No more. No less. They will tell you whatever you want to hear to sell it. Caveat emptor. It's a great product, but not for your intended use in your intended manner. You may want to check out bobistheoilguy.com for some unbiased info.

Now granted the following is referring to two guys with diesels at the marina but here it is:

One guy uses Amzoil religiously and has the oil analyzed religiously. I have not seen the #'s so I cannot comment. He has well over 500 hours on the original stuff + what he has had to add over the seasons. He is also replacing the engines and the damn things never sealed tight. Always a leak. BTW, depending on the material your seals are made of, your seals may leak as well.

another guy uses Rotella religiously and changes all fluids at 100 hours or once per season which ever comes first, religiously. He has not burned one quart of oil in 3 years and 500 hours.

Co-eenk-ee-dink? Don't know.

My auto mechanic of 15+ years notices an increase in the age and mechanical condition of the cars he works on that have their oil changed ** 3/3K intervals.

To me, its cheap insurance.

Again, it's info from the FWIW department.
 
Headnsouth, why anybody would not change engine oil at least once a season is beyond me. You seem to have the answers yourself so why ask the question?????? My engines, Crusader 454 XLs have 500 hrs with dino oil. I change the oil every 50 hrs and have never consumed any oil between changes. I'm sticking with what's rec. by the manufacturer.
 
Changing it at the end of the season is suggested because of the acids that are left in the oil as a result of byproducts of combustion. They will be there regardless of the type of oil you use.
 
All above advice is right on, the only thing I will add is going synthetic in a motor as old as yours can cause problems. Google synthetic oil and read.

I use synthetic oil, not so I don't have to change it as often, but more for the lubricating factors. I know that my motors run cooler and sound better, they also burn a very very little less gas as reported to me on my B&G fuel flow monitor.

Walter
 
quote:
Originally posted by walterv

....they also burn a very very little less gas as reported to me on my B&G fuel flow monitor.

Walter

Click to expand...


is that like a double negative meaning they still suck fuel like it's coming out of a fire hose, or is there a noticeable difference in consumption?
 
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