Trojan Boat Forum

prowlersfish wrote:More of my take on this . ( you have been warned )
Marine gas engines should go thousands of hours with a OEM spec filters , Race engines are not long lived , So I really question a 27 micron filter . My Cummins only uses 1 filter and oil flow is not a issue .

Paul How many hour do you have on yours ?

I will say it a again how often do you see a worn out marine engine ?( gas) they mostly run OEM spec filters . 99% die from Lack Of Use , marine age ( rust )and lack of maintenance .

Yes duel filters are used to improve flow on some marine gas engines . If a 27 micron filter would be a good improvement , you think thats what the marine engine would use . but they go with the more costly duel filter set up . Just my opinion

Now about oil ......

Warned??? OK, I think that we've beat this topic to death. I'll finish by re stating what I said in my original post on the subject, "I chose a different direction when it comes to oil filtration". Then I went on to explain why I chose this direction. I never said that a standard filter was the wrong thing to use. Your right, they work just fine. I simply chose a filtering system that in my opinion is better suited to my engine and the way it is used and maintained. As you can see in the pictures, I take pretty good care if my Trojan.

Engine hours as of haul out this past fall are about 530. She gets an oil change at the end of each season which works out to about every 60 hrs.

The oil, synthetic. Uh oh, I said the "S" word.

Paul ,this not to argue Just a good discussion . Nothing wrong with synthetic. Just not my choice But it would not hurt a thing to used it .

BTW I have sent you a PM with a question .

prowlersfish wrote:More of my take on this . ( you have been warned )
Marine gas engines should go thousands of hours with a OEM spec filters , Race engines are not long lived , So I really question a 27 micron filter . My Cummins only uses 1 filter and oil flow is not a issue .

Paul How many hour do you have on yours ?

I will say it a again how often do you see a worn out marine engine ?( gas) they mostly run OEM spec filters . 99% die from Lack Of Use , marine age ( rust )and lack of maintenance .

Yes duel filters are used to improve flow on some marine gas engines . If a 27 micron filter would be a good improvement , you think thats what the marine engine would use . but they go with the more costly duel filter set up . Just my opinion

Now about oil ......

OIL ?? and Zinc Levels ? I've read that zinc levels are very important to the older flat tappet engines. A mechanic did recommend Shell Rotella but the more I read about Rotella, the more I see that the ' new ' Rotella has low zinc levels. If you still can find the old stuff, it has higher levels. Dino, NAPA (Valvoline) and Valvoline VR-1 seem to be highly recommended for high zinc levels.

Lawman wrote:OIL ?? and Zinc Levels ? I've read that zinc levels are very important to the older rocker arm engines. A mechanic did recommend Shell Rotella but the more I read about Rotella, the more I see that the ' new ' Rotella has low zinc levels. If you still can find the old stuff, it has higher levels. Dino, NAPA (Valvoline) and Valvoline VR-1 seem to be highly recommended for high zinc levels.

Now you're talkin' Lawman. Zinc is definately something to think about if you have engines with flat tappets. Lots of companies have stopped adding it because of the disappearance of flat tappets in modern engines, and also due to modern emission regulations. If you have an older flat tappet engine its definately something to think on.

I have a bunch of older Mercedes Benz cars. Most of them are gas Alusil block V-8's and DOHC I-6's. (I have one diesel) I run Castrol GTX in them because of the relatively high levels of zinc in it compared to other modern oils, most of which have none at all.

I would strongly encourage anyone with older flat tappet engines to review what the zinc content in the oil they have been using is. That is, unless you have a bunch of camshafts around and like replacing them in your free time.