Primary and engine oil confusion

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May 22, 2009 | 04:55 PM

#11

AmericanNightmare73

Intermediate

Joined: Mar 2009

Posts: 36

Likes: 0

From: Cincinnasti

I'm running Rev Tech 70w in engine and Rev Tech's High Performance Gear and Chaincase Lube for Sportsters in the Tranny

May 23, 2009 | 12:41 PM

#12

pococj

Seasoned HDF Member

Joined: Dec 2004

Posts: 11,068

Likes: 1,478

From: Texas! Ya mean there's someplace else?

Quote:

Originally Posted by straydog13

80w???? are you sure about that?

That is a gear oil recommendation. 80w gear oil is about equal to mid 20 thru mid 30 weight engine oil.

May 29, 2009 | 06:26 PM

#13

straydog13

Seasoned HDF Member

Joined: Mar 2008

Posts: 5,134

Likes: 146

From: texas

are you saying 80w gear oil is the same as 30w engine oil?if you had a cup of each you couldnt tell the difference???----------i dont understand...i am not sure what i am missing.

May 29, 2009 | 09:34 PM

#14

IronMick

Stellar HDF Member

Joined: Jun 2008

Posts: 3,179

Likes: 118

From: London, ON Canada

Quote:

Originally Posted by straydog13

are you saying 80w gear oil is the same as 30w engine oil?if you had a cup of each you couldnt tell the difference???----------i dont understand...i am not sure what i am missing.

The weight numbers for gear oil are not the same as the weight numbers for engine oil. I personally do not know what they represent or how they are determined, just that they are not the same.

May 30, 2009 | 11:55 AM

#15

straydog13

Seasoned HDF Member

Joined: Mar 2008

Posts: 5,134

Likes: 146

From: texas

i honestly never knew that.i always assumed(theres that word again..) that it was the same rating system.i understand there was most likely different additives for a gear oil compared to an engine oil but i always thought the weight of it would be on the same scale.