I need to bleed my rear brake tomorrow and have a large Halfords nearby. Is there any reason why I couldn't top things up with this stuff?:
[url= http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_525681_langId_-1_categoryId_165608 ]Halfords Mineral Oil[/url]
Shimano say not to. I ignore 'em and use finish line in mine, because it's what I happened to have lying around. The bikehut stuff will almost certainly be absolutely fine too.
Recenttly use the halfords stuff in my XTs without any dire failure (other than the usual dire failure of my legs).
Used Morris Mineral oil from GSF (german Swedish French car parts shop)its used for suspension in Citroen cars. Much cheaper than Halfords and been in my Shimano brakes for at least 3 years with no problems.