gavin@iow
Registered user
API SE, SF, SG doesn't mean it can't be synthetic, Bel-Ray do a synthetic 20w50 oil that is SG rated.Le singe said:BMW 1100GS handbook, oils of the category API SE, SF, SG, with CC or CD.
therefore no recommendations for semi- or fully-synthetic.
But as Timolgra says, 'some people think they know better'.

