Information and questions on GL1800 Goldwings (2001-2017)
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Post by rogerm »

is castrol < syn. oil> sae.5w 30. safe to use in a 1800 goldwing

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Steve F
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'03 GL1800

Re: oils

Post by Steve F »

I make sure that when buying an oil, ANY oil that's goin in the engine, that it NOT have the friction modifiers (I'm not sure of the technical name for these substances) as they can do damage to a wet clutch, as in our Goldwings.
I stick with "motorcycle specific" oil, like MOBIL1 10w30 synthetic racing 4T.....motorcycle specific.
VALVOLINE also makes the same thing, and I'm sure others do too.
Some will use the ROTELLA oil, made for diesel engines and have no complaints, but I wouldn't.
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Re: oils

Post by Viking »

You need to look for a JASO MA or MA2 somewhere on the label. This indicates that it is suitable for motorcycles with wet clutches. I do not believe that the Castrol you mentioned fits this category.
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Re: oils

Post by tfdeputydawg »

I've never seen anywhere that Honda recommends 5W for 1800's
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Re: oils

Post by BendItTwice »

rogerm wrote:is castrol < syn. oil> sae.5w 30. safe to use in a 1800 goldwing

Honda recommends 10w30 (depending on climate).
5w30 covers a wider temp range. It will allow running in colder climates.
Honda manual diagram:

I use 15w40 (UK)
Typically (depending on whose figures you read) covers -10c to 40c.
Random internet diagram:

'Motorcycle Oil' It's a CON!
Use oil (which includes oil for Cars and Diesels) with the correct temp range, without molybdenum additives and an API service classification SG or higher.
Cheap Oil often and the engine WILL last a lifetime.

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