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Old 29 January 2013, 11:54   #1
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Mixing gearbox oil brands - problem?

An odd one - a friend has a brand new (potentially non-PDIed) Tohatsu 9.8 2T and the gearbox is not quite full of oil - is it OK to top this unknown oil up with another brand? I seem to recall something about some oils reacting - can't remember...

Thanks in advance!
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Old 29 January 2013, 11:59   #2
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I believe this is possible, but unlikely with hypoid oil. Also, most car gearbox oil means the required spec, and is cheaper than the marine branded stuff.
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Old 29 January 2013, 12:34   #3
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DONT mix with car hypoid if it hasn't even been PDI'd yet!
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Old 29 January 2013, 12:51   #4
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What is car hypoid and how did it get into my thread?

The gearbox has what was shipped from Tohatsu (I presume) and the oil I have is Mercury...

Did I use the word gearbox incorrectly in a sentence?

I probably mean Marine Gear Oil
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Old 29 January 2013, 13:23   #5
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As the amount the box holds is tiny, I'd dump the lot and start again.
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Old 29 January 2013, 13:44   #6
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Quote:
Originally Posted by Dirk Diggler View Post
As the amount the box holds is tiny, I'd dump the lot and start again.
Seconded. You'll lose a load in trying to top it up anyway.
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Old 29 January 2013, 13:46   #7
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Quote:
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As the amount the box holds is tiny, I'd dump the lot and start again.
Yes - in the absence of a positive response, this would be my personal choice as it is the safest. I was more curious than anything and it would have been a waste to dump it if it was OK to use.
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Old 29 January 2013, 14:04   #8
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..it would have been a waste to dump it if it was OK to use.
F'k, is it that bad over there?
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Old 29 January 2013, 14:15   #9
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F'k, is it that bad over there?
S'always lean in the willk household

In this case I happen to be in possession of the oil but not the engine, so I'm potentially exposed to being expected to make some uncharacteristically generous gesture...

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Old 29 January 2013, 14:41   #10
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S'always lean in the willk household

In this case I happen to be in possession of the oil but not the engine, so I'm potentially exposed to being expected to make some uncharacteristically generous gesture...

Ah, the trick there, is to quietly decant the oil into a pickled onion jar to throw him off the scent. If he should happen to have a bit of Welsh in him or be a particularly tricky f'er, I'd chuck in a couple of onions in for good measure.
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