Synthetic oils


Technical information and Q&A applicable to all years and models of Goldwings
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propstop
Posts: 17
Joined: Wed Aug 19, 2009 10:27 pm
Location: Louisiana
Motorcycle: 1983 GL1100A Aspencade

Synthetic oils

Postby propstop » Tue Sep 01, 2009 5:36 pm



I was told not to use synthetic oil in my engine because it has a wet clutch. Is this true?



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WingAdmin
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Posts: 17046
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Synthetic oils

Postby WingAdmin » Tue Sep 01, 2009 6:29 pm

Yup. Synthetic oils have friction modifiers that don't do well with wet clutches that share engine oil. You're best off using regular dino oil - I prefer using motorcycle-specific oil (Valvoline, in particular), but others use regular car oil in their Wings without problems.

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detdrbuzzard
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Location: 42.23/83.33/636
Motorcycle: '84 aspencade,'93se
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Re: Synthetic oils

Postby detdrbuzzard » Tue Sep 01, 2009 7:49 pm

if you just have to have synthetic oil in your bike make sure what ever oil you use is motorcycle specific. it's the automobile oils with friction modifiers
'99 ST1100, '93 se
'75 cb750k, '79 cb 750f, '79 cb750 superK
cb 450sc, sunL70
'06 st1300a
.... william

propstop
Posts: 17
Joined: Wed Aug 19, 2009 10:27 pm
Location: Louisiana
Motorcycle: 1983 GL1100A Aspencade

Re: Synthetic oils

Postby propstop » Wed Sep 02, 2009 8:32 am

Thanks for the info. Think I will stick with regular oil.

vtx1800
Posts: 1
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Location: orem utah
Motorcycle: 2003 Honda VTX1800S
1992 GL1500 Aspencade

Re: Synthetic oils

Postby vtx1800 » Fri Sep 04, 2009 11:00 am

I have been running AMSOIL synthetic for motorcyles in my VTX since new with no problems. Its was designed for motorcycles with wet clutchs. It made my VTX shift smoother than the original oil. I have about 50,000 miles on my VTX now and time for another change. I have been told that in older engines not to use synthetic because it could cause seals to leak because it cleans things up and the seals are old. A mechanic friend told me not to use it my Goldwing (92) because of this. Don't know if that is true or not.

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WingAdmin
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Posts: 17046
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Synthetic oils

Postby WingAdmin » Fri Sep 04, 2009 11:10 am

Any high-detergent oil can do this. With old seals, the crap and sludge lodged on it can be the only thing keeping the seal from leaking. High detergent oil can emulsify this sludge, allowing it to be drained with the oil. Next thing you know, you have oil leaks. Oil treatments like Seafoam can do the same thing.

Personally, I'd rather have a clean engine and replace leaky seals, but that's just me.

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Mooseman
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Motorcycle: 1996 GL1500SE 88k
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1985 GL1200A (SOLD) 85K
1986 BMW K75c 25K

Re: Synthetic oils

Postby Mooseman » Thu Sep 10, 2009 6:38 pm

When I owned my 1985 Aspencade since new I used 10-40 AMSOIL with no problems. I put about 5K to break it in and then started using the Amsoil. 75K later not one related oil issue. Clutch worked fine. I just purchased a 1986 Aspencade that has only 20k on the meter. When I change the oil I will be using synthetic. It's also my understanding that a synthetic oil will actually cause the seals to swell a little bit and cure that little oil seeping around a seal. My Chev truck with a automatic and 235k on the meter was leaking at the front trans seal like crazy. I was just adding oil to prolong the rebuild. Put in some synthetic trans fluid and after about a month it stopped leaking like crazy to the slow occasional drip. As always your mileage may very. Another thing about oil's is everyone has an opinion. Use a good oil, change often and enjoy the ride.

Mooseman
1986 Aspencade
Enjoy the ride. They are all good, just some better than others.
Mooseman

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dnehasert
Posts: 132
Joined: Sun Sep 27, 2009 11:25 pm
Location: Mesa AZ.
Motorcycle: 1982 GL1100 with Watsonian sidecar

Re: Synthetic oils

Postby dnehasert » Sun Sep 27, 2009 11:31 pm

Synthetic oil will not make your clutch slip. I have used it in several bikes with no problem. It did leak at the seals on a 1980 BMW R100 but never a problem on my GL1100's. Friction modifiers are in oil 10w30 and lower, and is usually dino oil. Auto oil is fine, you do not need the higher priced "motorcycle oil." Doug

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upssnowman
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Location: SW. Virginia live on the Blue Ridge Parkway

Re: Synthetic oils

Postby upssnowman » Thu Oct 01, 2009 9:57 pm

Shell Rotella T synthetic is fine it will not hurt the wet clutch at all
also mobil-1 is fine
as long as the oil does not have the energy conserving lable on it it wil be fine




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