Originally Posted By: DoubleWasp
Originally Posted By: irv
Originally Posted By: DoubleWasp
FC-W is not a magic formula. FC-W is more like that sign that says "You must be this tall to enter this ride".
There is no special ingredients or amounts in FC-W oil. Uses the same building blocks as a'll oils. FC-W testing is just verification that it meets certain standards.
Corrosion inhibitors and shear resistance are extraordinarily common themes in motor oils for reasons other than marine use. HDEOs in particular get enough engineering and fortification for both factors due to their own extreme environments.
This is why when it comes to marine diesels, you never hear jack about FC-W. Some of these engines are clocking decades of operation without ever having seen a drop of FC-W oil.
FC-W is an OK verification system of properties, but hardly an exclusive club where only the named can perform the task.
You could be right, but anything I have ever read said the use of Automotive engine oil should not be used in marine engines.
https://www.boatingmag.com/how-marine-oil-made
Also, I don't believe comparing diesel oils to gassers is an apples to apples comparison, but that's just my opinion.
The statement not to use automotive oils in marine engines is good solid advice, but only in the sense that following this advice is 100% fool proof in preventing an unworthy oil from entering a marine engine. It's also the exact advice I would give to someone who just doesn't know engines.
It does not mean that all land oils are unworthy.
Talk to some gas charter boat operators, and I bet they have some ungodly amount of hours on engines they are running on Rotella HDEO.
I know a most of the big HP powerboat guys are running racing oils for land engines. Schaeffer and VR1 being the two biggest names in play.
You are correct that diesel engines are not apples to apples. The reason why is because shear and corrosion limits are already a part of almost every land diesel engine certification and spec out there, and almost all exceed the spec of FC-W.
HDEO is always spec'd according to the diesel engine out there getting beat to death, doing the absolute worst job in the worst conditions. They're thinking about that pump or generator that's going to be started in subzero, slammed to WOT, and then run for days, or that slasher that's going to be slamming over piles of logs in a 100+ degree rain forest. By the time marine usage comes into play, the engineers are practically shrugging their shoulders with palms turned up.
Are we talking about marine auto type engines/big blocks or outboards?
I am referring to outboards myself, like in the OP's original posts.
Outboards, like stated earlier are different animals. Charter guys likely use their engines daily or almost daily throughout the season and big H/P type guys likely rebuild their engines annually or at least semi-annually.
I know with my bud's old big block, blown 468 jet boat, he ran Brad Penn oil in it but that boat was pulled after every weekend and rebuilt every year. Different animal/different comparison.
Personally, I'm not one to get all caught up in marketing claims and the hype that one normally sees with regards to engine oil, but when it comes to having warranty coverage, I will always run what is recommended until at least that time is up.
Also, I don't do the engine mtce on my boat as far as oil/filter/lower unit fluid changes go. It makes more sense for me money wise just to have the marina where I purchased and store my boat to do that for me. They use Merc oil in my boat and have since new, obviously, but even if I was to do this myself, I would still most certainly use the recommended marine oil for it.
My bud also uses Merc oil in his 300 Merc that he drag races quite often. He belongs to a few specific type forums that talk/deal with nothing but racing/speed applications, and all, according to him, use Marine based oils as well.
Originally Posted By: irv
Originally Posted By: DoubleWasp
FC-W is not a magic formula. FC-W is more like that sign that says "You must be this tall to enter this ride".
There is no special ingredients or amounts in FC-W oil. Uses the same building blocks as a'll oils. FC-W testing is just verification that it meets certain standards.
Corrosion inhibitors and shear resistance are extraordinarily common themes in motor oils for reasons other than marine use. HDEOs in particular get enough engineering and fortification for both factors due to their own extreme environments.
This is why when it comes to marine diesels, you never hear jack about FC-W. Some of these engines are clocking decades of operation without ever having seen a drop of FC-W oil.
FC-W is an OK verification system of properties, but hardly an exclusive club where only the named can perform the task.
You could be right, but anything I have ever read said the use of Automotive engine oil should not be used in marine engines.
https://www.boatingmag.com/how-marine-oil-made
Also, I don't believe comparing diesel oils to gassers is an apples to apples comparison, but that's just my opinion.
The statement not to use automotive oils in marine engines is good solid advice, but only in the sense that following this advice is 100% fool proof in preventing an unworthy oil from entering a marine engine. It's also the exact advice I would give to someone who just doesn't know engines.
It does not mean that all land oils are unworthy.
Talk to some gas charter boat operators, and I bet they have some ungodly amount of hours on engines they are running on Rotella HDEO.
I know a most of the big HP powerboat guys are running racing oils for land engines. Schaeffer and VR1 being the two biggest names in play.
You are correct that diesel engines are not apples to apples. The reason why is because shear and corrosion limits are already a part of almost every land diesel engine certification and spec out there, and almost all exceed the spec of FC-W.
HDEO is always spec'd according to the diesel engine out there getting beat to death, doing the absolute worst job in the worst conditions. They're thinking about that pump or generator that's going to be started in subzero, slammed to WOT, and then run for days, or that slasher that's going to be slamming over piles of logs in a 100+ degree rain forest. By the time marine usage comes into play, the engineers are practically shrugging their shoulders with palms turned up.
Are we talking about marine auto type engines/big blocks or outboards?
I am referring to outboards myself, like in the OP's original posts.
Outboards, like stated earlier are different animals. Charter guys likely use their engines daily or almost daily throughout the season and big H/P type guys likely rebuild their engines annually or at least semi-annually.
I know with my bud's old big block, blown 468 jet boat, he ran Brad Penn oil in it but that boat was pulled after every weekend and rebuilt every year. Different animal/different comparison.
Personally, I'm not one to get all caught up in marketing claims and the hype that one normally sees with regards to engine oil, but when it comes to having warranty coverage, I will always run what is recommended until at least that time is up.
Also, I don't do the engine mtce on my boat as far as oil/filter/lower unit fluid changes go. It makes more sense for me money wise just to have the marina where I purchased and store my boat to do that for me. They use Merc oil in my boat and have since new, obviously, but even if I was to do this myself, I would still most certainly use the recommended marine oil for it.
My bud also uses Merc oil in his 300 Merc that he drag races quite often. He belongs to a few specific type forums that talk/deal with nothing but racing/speed applications, and all, according to him, use Marine based oils as well.
