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Old 01-18-2009, 01:20 PM
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Default What is the difference between marine and regular motor oil, besides being more expensive?

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Old 01-18-2009, 01:24 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

2stroke, 4stroke, diesel, etc.? There are many differences in 2stroke oils. The difference in automotive and marine 4 stroke oil is just that certain oils are made to marine specifications. Many of the better automotive oils are more than adequate for marine use.
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Old 01-18-2009, 01:29 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

thanks for the quick response. I should have told you that I have 4 stroke Yamahas and I can't go to the local Yamaha store here. I'm looking for a good alternative for their rather pricey (especially after shipping costs) oil.
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Old 01-18-2009, 01:29 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Oh No Not Again!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 01-18-2009, 01:50 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Well...if you're still in the warranty period, the difference is warranty coverage
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Old 01-18-2009, 02:13 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Quote:
twentynine - 1/18/2009 4:29 PM Oh No Not Again!!!!!!!!!!!!!!!!!!!!!!!!!
Has it really been three days already?
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Old 01-20-2009, 07:48 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Many of the auto. oil companies do not rec. that thier oil is to be used in a four stroke outboard due to the high revs of the engine. I have been told this over the phone by thier tech lines.
Give one a call that you are thinking of using and see what they tell to you.
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Old 01-20-2009, 08:31 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

A manufacturer can only require that your oil meet their written specs. They cannot require you to use their brand for warranty purposes. If they did, they would be required to provide the oil to the customer.
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Old 01-21-2009, 04:53 AM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Corrosion inhibitors and anti foaming additives are the only difference....And it's not much of a difference. But, if you can find an FC-w oil use it. Your only talking a $1.50 a quart difference in price anyway.
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Old 01-21-2009, 06:59 AM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Quote:
werehere2 - 1/18/2009 1:29 PM

thanks for the quick response. I should have told you that I have 4 stroke Yamahas and I can't go to the local Yamaha store here. I'm looking for a good alternative for their rather pricey (especially after shipping costs) oil.

I used to have a pair of F225's. I put over 1400 hours on them beofre I sold the boat. I never put anything other than cheap Penzoil in those motors and they never once skipped a beat.
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Old 01-21-2009, 07:05 AM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

from suzuki, for what its worth:

What type of oil should I use in my Suzuki outboard?
We suggest that customers use genuine Suzuki 4 Cycle Engine Oil. We feel our oil is the best available on the market today. Our oils are formulated to provide superior lubrication and protection for internal engine parts in the harsh marine environment. Suzuki oil meets the National Marine Manufacturer Association (NMMA) Four Cycle Water Cooled (FC-W) standards. The actual oil recommendation is: SAE or NMMA FC-W 10W-40 (operating in temps from 14 degrees to over 100 degrees F) or 10W-30 (operating in temps from -4 degrees to 86 degrees F) API or NMMA FC-W Classification SE,SF,SG,SJ. For temps below -15 degrees F use SAE or NMMA FC-W 5W-30.

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Old 01-21-2009, 07:06 AM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?

Check this out...

http://goliath.ecnext.com/coms2/gi_0...re-marine.html
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Old 01-21-2009, 11:59 AM
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Default RE: What is the difference between marine and regular motor oil, besides being more expensive?

Duke of oil: are marine four-stroke oils any better than less expensive automotive lubes? We test 'em to find out.
Publication: Trailer Boats
Publication Date: 01-OCT-04 Format: Online - approximately 2487 words
Delivery: Immediate Online Access


...family feuds, fisticuffs and the occasional bar brawl about two-stroke lubricants, the four-stroke crowd embroiled in its own controversial confrontations concerning oils.

Being on the cutting edge of all things engine related, Trailer Boats tested specialty marine four-stroke oils, and compared their prices and formulations to popular automotive oils. There's a big price difference between the two groups, and we wanted to see what you get for your dough. Various oils were sent for laboratory analysis. We also included a sample of used oil from a Yamaha F225 four-stroke to see what 100 hours of running does to oil (see sidebar). And to gain an idea of each lube's potential corrosion resistance, we placed steel plates soaked in different oils in a saltwater environment.

SURPRISING FINDINGS

Four-strokes have completely different requirements than two-strokes, and thus require separate lubrication parameters. Four-stroke outboards, inboards and sterndrives are similar to automotive engines in that they have pressurized recirculating oil systems; most also use replaceable oil filters. Additional maintenance is necessary every 100 hours or so. This consists of draining, replacing and disposing of several quarts of engine oil and the filter.

Just as automotive oils are classified by the American Petroleum Institute (API) and Society of Automotive Engineers (SAE), four-stroke marine oils will soon be certified under standards set by Chicago-based National Marine Manufacturers Association (NMMA). According to Tom Marhevko, the association's director of engineering standards, certified oils will be labeled FC-W (four-cycle-water-cooled), and will have to pass test sequences that include fuel dilution resistance and corrosion protection, as well as elevated temperature operation and lubricity at high rpm. Just like the TC-W3 rating defined the industry's standard for two-stroke outboard oils, FC-W oils will set the standard for four-stroke powerplants.

MULTITASKING

Lubricating moving parts is only one of the many jobs a four-stroke oil has to accomplish. Besides keeping metal components from scraping, it must remove heat from internal engine areas, clean up combustion...

NOTE: All illustrations and photos have been removed from this article.
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Old 01-21-2009, 12:17 PM
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Default RE: What is the difference between marine and regular motor oil, besides being more expensive?

I will say just like 2S oil there are differences in additives, most auto usuage is not at 5 to 6K all the time and I'm sure that needs some extra anti foaming agents or something.
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Old 01-21-2009, 03:14 PM
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Default Re: What is the difference between marine and regular motor oil, besides being more expensive?


FC-W outboard 4-stroke oils are different from automotive oils as car oils are not tested for corrosion resistance or fuel dilution, 2 problem areas in boating environments. With the reduced anti-wear additives that car oils now have to appease the EPA, outboard manufacturers wanted something better for their products.

Specialty oils like FC-W are more expensive because they not only similar to car oils but in addition they have to use more additives which are more costly. Not only that, but since they are blended in smaller quantities than auto lubes, the cost will be higher - just as in any type of product.

Here is a link to the whole "Duke of Oil" article that came out in 2004, a year before the FC-W certifications took affect. Keep that in mind when reading the story as the results are out of date. Every oil mentioned is different than it was 5 years ago.

http://continuouswave.com/whaler/ref.../dukeOfOil.pdf

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