It is called the 'Oil War,' Beemie, and it is an endless war. Just follow Triumph's recommendations as to type and weight, and don't worry about it. Just don't use any oil that says "energy conserving" on the can, as it can, not always, but can, cause clutch slippage.
I use Castrol's semi-synthetic 10W-40. You can get it for a little over $2.30 a quart at Wal-Mart. Others will swear by other brands, etc. NO studies (that is, no reputable, independent studies) indicate marked performance superiority of one brand over another. Amsoil users may disagree with that since Amsoil pays a bundle to "test" their oils against others and they always come out ahead. Wonder why?
Anyway, follow Triumph's recommendations as to weight and type and forget their recommendations as to a specific brand.
Just one old man's advice and opinion. Many will no doubt follow and you can choose the answer that makes you most comfortable.
Take care,
Monte
Edited this. Just realized I created my own brand:Castol.
[ This message was edited by: mecscc on 2004-05-09 21:52 ]
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