Royal Purple 75W-90

mikesth · 02-24-2008, 07:32 PM

Decided to change my final gear oil before Palestine now that I've run Dino between 600 and 3100 miles. Picked up Royal Purple 75W-90. It meets the GL-5 spec, but I havn't seen multiple gear weight like that before. Is it ok to run in my final drive?

Thanks...

nomadd · 02-24-2008, 08:47 PM

I'm no oil expert but I'll put in my 2 cents worth. The Kawasaki service manual calls for GL-5 EP Hypoid oil in the rear end. It also calls out temp ranges to use the SAE 80 below temps of 5 degrees C, or the SAE 90 above temps of 5 degrees C. Now given the fact that the Royal Purple is a GL-5 and is also basically a synthetic 75 weight oil with properties of a 90 weight oil when hot you have the best of both worlds. Short answer I would'nt hesitate to use it. UMMV

mikesth · 02-24-2008, 08:54 PM

Thanks! I was guessing it would be ok, but it's better to know. I'd hate to get down the road and hear grinding...

pablo · 02-25-2008, 09:08 AM

I'm using the Royal Purple 75W-90. I now have 17,500 on the bike and no problems. So far, so good.
Paul

mikesth · 02-25-2008, 09:14 AM

Feeling even better - thanks Paul!

U going to Palestine? I was at Sam many years ago, for 5 years. You should be closer than we are in Houston :)

blowndodge · 02-25-2008, 10:53 AM

Food for thought. I've never heard of anyone in 35 years of motorcycling have a final drive problem from mixing different gear oils or using the cheapest hypoid oil available. The only purpose for this kind of oil is to cushion the meshing of the teeth. period.

pablo · 02-25-2008, 10:42 PM

Quote:

Feeling even better - thanks Paul!

U going to Palestine? I was at Sam many years ago, for 5 years. You should be closer than we are in Houston :)

I don't know yet. We have some conflicts with kid stuff and with getting my dad situated with assisted living in San Antonio. If we can work it out we would love to go. I probably won't know 'til the last minute.

dogdoc · 02-26-2008, 10:05 PM

75-90W gear oil is gear oil,

02-24-2008, 07:32 PM	#1
mikesth Member Join Date: Nov 2007 Location: Katy Texas Posts: 478	Royal Purple 75W-90 Decided to change my final gear oil before Palestine now that I've run Dino between 600 and 3100 miles. Picked up Royal Purple 75W-90. It meets the GL-5 spec, but I havn't seen multiple gear weight like that before. Is it ok to run in my final drive? Thanks... Login or Register to Remove Ads
	0

02-24-2008, 08:47 PM	#2
nomadd Member Join Date: Feb 2008 Location: S.E. Massachusetts Posts: 164	Royal Purple 75W-90 I'm no oil expert but I'll put in my 2 cents worth. The Kawasaki service manual calls for GL-5 EP Hypoid oil in the rear end. It also calls out temp ranges to use the SAE 80 below temps of 5 degrees C, or the SAE 90 above temps of 5 degrees C. Now given the fact that the Royal Purple is a GL-5 and is also basically a synthetic 75 weight oil with properties of a 90 weight oil when hot you have the best of both worlds. Short answer I would'nt hesitate to use it. UMMV
	0

02-24-2008, 08:54 PM	#3
mikesth Member Join Date: Nov 2007 Location: Katy Texas Posts: 478	Royal Purple 75W-90 Thanks! I was guessing it would be ok, but it's better to know. I'd hate to get down the road and hear grinding...
	0

02-25-2008, 09:08 AM	#4
pablo Advanced Member Join Date: Jul 2007 Location: Huntsville, TX Posts: 571	Royal Purple 75W-90 I'm using the Royal Purple 75W-90. I now have 17,500 on the bike and no problems. So far, so good. Paul
	0

02-25-2008, 09:14 AM	#5
mikesth Member Join Date: Nov 2007 Location: Katy Texas Posts: 478	Royal Purple 75W-90 Feeling even better - thanks Paul! U going to Palestine? I was at Sam many years ago, for 5 years. You should be closer than we are in Houston :) Login or Register to Remove Ads
	0

02-25-2008, 10:53 AM	#6
blowndodge Sr. Contributor Join Date: Jul 2007 Location: Washington City, Utah Posts: 16,474	Royal Purple 75W-90 Food for thought. I've never heard of anyone in 35 years of motorcycling have a final drive problem from mixing different gear oils or using the cheapest hypoid oil available. The only purpose for this kind of oil is to cushion the meshing of the teeth. period. __________________ I love my Victory Cross Country Tour 106. Smells like Victory! Ultra's are Limited There are two types of Harley riders. Those that trailer them and those that push them. The most Interesting Man in the World "Find the things in life you don't do well and don't do those things" Member # 0005
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02-26-2008, 10:05 PM	#8
dogdoc Top Contributor Join Date: Jul 2007 Posts: 5,263	Royal Purple 75W-90 75-90W gear oil is gear oil,
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