I have a 2011 Triumph Tbird 1600 and the owners manual specs Castrol Power 10w40 or 10w50. The dealer mechanic recommends and uses the 10w50 exclusively but Advance Auto carries the 10w40. I would like to buy the oil at AAP for $9 and avoid the $15 dealer cost if possible.
Does anyone know if there is much difference with the two? The engine is stock and doesn't get run hard at all.
Does anyone know if there is much difference with the two? The engine is stock and doesn't get run hard at all.
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