When to change the oil

Information and questions on GL1200 Goldwings (1984-1987)
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When to change the oil

Postby twocams » Mon Jun 20, 2016 11:57 am

Ive been playing with motorcycles for over 45 yrs/cars even longer. Iv had a few none runners of each but wanted to change the oil. Maybe just to check and make sure no big chunks came out. :shock: :roll:
Then one day it occurred to me...why am I starting this bike up just to change the oil? All the oil in the pan is all there's going to be. Its already drained off the rockers,crank,mains. Its all in the pan, just pull the plug. If the vehicle has to be raised, just jack from the opposite side of the plug. I know we have all been told to let the engine warm up good, Ive been to 3 USAF tech schools, I know.
I think part of that comes from shops that do your oil changes, they don't have a choice. You drove your vehicle to them....its hot. There are times when I change my oil hot, I just don't have a choice.
Ok lets hear your thoughts. Im I just blowing smoke?


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Re: When to change the oil

Postby SilverDave » Mon Jun 20, 2016 1:59 pm

TwoCams :
Thats an '85 Aspy , just like mine ?

I always change my oil when its cooled down just a bit
( Hot oil all over the two fingers holding the removal plug os no fun !)

but I read once , somewhere that you get about 1/3 cup more oil if its warm , as it comes out of all the tiny channel s and small orfices better when its hotter.
And in the fall, before putting it away , I add back about 1/2 litre of the cheapest truck oil I can find , spin it up with kill switch on, and also drain that , just to get out the last little bit of grime and black oil.


But a better question , is since its a "Stator comprimised" GL1200, how often to change oil ?.

Once about 12 years ago ,an oil engineer at UCLA, who also rode did a lot of research on motorcycle oils, and published his results .
He found that most all oils, even the most expensive and pricy , had very serious viscosity and additive breakdown after 1500 to 2000 miles ( wow !! )

Secondly , although long ago I hard soldered / shrink wrapped my three yellow wires and added an Electrical Connections 1200 harness .... I also read that at least part of the stator failure problem was the hot, corrosive ( acids ?) old oil that chewed up the stator wire covering , also causing failure.

So.... for both the above reasons

I change MY Gl1200 oil every 3000 to 4000 km ..


( and not even getting into the discussion about just exactly why Honda engineers way back in '83 to '87 thought that a good way to cool a stator was to immerse it in very hot engine oil ....... What were they thinking ??)


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Re: When to change the oil

Postby WingAdmin » Thu Jun 23, 2016 7:59 pm

Add some Seafoam to your crankcase, and ride (gently) for a bit. The Seafoam lowers the overall viscosity, and cleans sludge out of your engine. That way even when cold, thanks to the thin viscosity, you get good drainage. I do it every fall.

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