OMC Lube Question

[bjb87gta]

Does anyone out there have any experience or know if a 80w-90 lube made by companies like valvoline, penzoil, etc. can be substituted for the factory OMC lube found only at the dealer with out causing any problems? I've heard it from others that both types can be used, but I was wondering if there is a difference or not. Thanks for any thoughts either way.

 

[Boatist]

Re: OMC Lube Question

I think there is a difference but I do not know what it is. The OMC Ultra HPF will accept up to 10 percent water with no damage per OMC.<br /><br />I guess My question is: For the 5 bucks you will save on a oil change is it worth risking your lower unit?? Unless you do your own work it would cost you hundreds of dollars and durning the boating season would probably take weeks to get boat in and then weeks to repair. Just my 2 cents.

 

[Mikedg]

Re: OMC Lube Question

I use the Penzoil 75-90 in my outboard. It's a sythetic blend and seems to be doing the job. From what I've read, the synthetics have a longer service life before breaking down.<br /><br />OMC specifies thier oil only since it is the only one they distribute. I've been running Penzoil gear oil in this motor for 5 years and standard Penzoil 40W in my inboards for 3, not the expensive Mercury oil from the dealer.

 

[BlackSmoke]

Re: OMC Lube Question

I've got a '69 Stringer and my mechanic said 80w-90 marine gear lube was just fine, but I'd like to hear from others about this.

 

[jee70611]

Re: OMC Lube Question

You may have a problem using standard gear oil in a lower unit due to "foaming" of the oil. Marine grade oil is formulated to prevent this if I'm not mistaken. Someone correct me if I'm wrong.<br /><br />James