fussy on GC oils ???

[crosbyman]

Marine GC  oil    946ml can now 25$  at Canadian Tire …. 🙁      for  cd ad td rd type of GC

would any  75-90 garde oils be ok for a few runs in the summer…     it  gets dumped anyway  come autumn…

75-90 grade oil is 25$  GALLON

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• This topic was modified 3 years ago by crosbyman.

[aquasonic]

I recall reading that marine grade gear oil should be used. The non-marine tends to build up more vapor pressure. At least that’s my recollection.

Improvise-Adapt-Overcome

[fleetwin]

aquasonic wrote:

I recall reading that marine grade gear oil should be used. The non-marine tends to build up more vapor pressure. At least that’s my recollection.

You make a great point indeed!  I never gave any thought to vapor pressure issues.  Needless to say, excess vapor pressure could overcome seals/orings/gaskets ability to seal.

[need2fish]

Aside from the viscosity, I believe the more complex gearcase lubes need additives. That is, the larger gear (for cooling) and complex (for helical gears) oils require long-chain and low shear additives.

[billw]

It has been said that GL5-rated gear lubes will “attack yellow metals,” which there is often a lot of, in OMC lower units. Sometimes I have run into OMC units that have had very severe wear to these bushings/bearings and I wonder whether that had anything to do with it, or not.

Long live American manufacturing!

[crosbyman]

Thanks to all for your inputs….$25 it is …..but like many things in the last 2 years  I just felt abusive pricing  is creeping up is everywhere and  possibly unjustiable.

the petroleum industry profits seems to support the trend 🙁

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