omc oil help

[66mstgfsbk]

i have a 84 omc stringer behind a 305ci, its a mechanical shift. i did a search and cant find anything on what type of synthetic oils to put in the upper lower and the intermediate. in my book it says hi vis and gear oil or typeII. i cant find types and weights, can someone please help i plan on using amsoil or red line oil just dont know what type, weight and what goes in what place. thanks for any help. also what type of synthetic can i use in the tilt housing or shoul;d i stick with regular oil

 

[66mstgfsbk]

Re: omc oil help

anyone?

 

[Gary H NC]

Re: omc oil help

I would stick to regular oil.Synthetics can cause old seals to leak.
If it call for the OMC high Vis then you can use the Merc High performance gear oil.
Hi-Vis is no longer made.

 

[danond]

Re: omc oil help

Ugh. I'm not going to post again for fear of starting an oil jihad, but synthetics don't cause seals to leak. They clean better than dino oil and get rid of crap blocking the seals, which have since dried out. The seals will very likely stop leaking, if they even do (I've never experienced this in many engines, many years of switching to synthecis - none of them have leaked), once the seals adjust.

Use the right weight and a name brand synthetic if it makes you feel better. At the end of the day, though you should be changing it so often that it doesn't matter.

 

[Gary H NC]

Re: omc oil help

I have experienced oil leaks starting after switching to synthetic on older engines.. Usually the rear main.......

 

[bruceb58]

Re: omc oil help

You can use Mobil 1 gl-5 75w-90 synthetic gear lube in that.

 

[66mstgfsbk]

Re: omc oil help

so 90Wt it is im gonna put amsoil in the intermediate, upper, and lower tomorrow. last question the only 30Wt ive been able to find is valvoline non-detergent oil will that be ok or should i keep looking