How is the newer Merc 25w-50 synthetic blend? It sounds like it has the ant-wear ingredients in it since they say not to use it in catalyst engines.

http://www.jamestowndistributors.com...t.do?pid=97761

What do all those mean in terms of the oil? .....API,SJ,SM,SN ILSAC. ect

API is the quality level of the oil.

Ken

I've also been running Mobil 1 V Twin for some years now along with the Wix 51060R.

Side note, still remember you guys aired out on the LEOPA run....we were running hard that day!!

Always had good success with Valvoline 20-50 VR1 Conventional. When I had big power and super chargers I changed it every 15 hrs. Now with the 500 EFIs I change it 25hrs. Always looks good. easy to find. I either run WIX or KN Oil Filter. Of course lubrication thread is always the most controversial, especially in the winter. This thread will derail soon. Lol

Have not tried brad penn in marine app, but we use it in race motors with great success, so I think would be great, I am using amsoil lubes now and they seem to be great.

I'm currently running Mobil 1 15w-50 with ~1300 ppm zinc, how do the zinc level compares with the merc synthetic blend 25W-40?

http://www.enginelabs.com/engine-tec...es/#fbComments

http://www.oilspecifications.org/api_eolcs.php

And this one is really handy: http://www.noln.net/sites/default/fi...il%20guide.pdf


The question I have is which ones really matters?

I also use Brad Penn in my FED and would not use anything else in my race motor. I am currently building a new motor for the boat and was planning on running it after the initial break in with Lucas break in oil.