How do you like the Triple? I saw one in black. Nice bike.
I have a (08) Sprint ST. I have agonized over the oil price myself, for Mobil Triumph 15w-50. You know that they recommend 6000 mile ocis with this oil?
I am almost inclined to think, that the Triumph clutch likes an oil close to an HDEO, and is "sort of sensitive", to moly.
I know that Mobil has moly. But, I am not sure about the content in the Mobil Triumph specific 15w-50.
I would stick with a low moly content HDEO 40 or 50 weight oil, using your 2500 mile ocis.
T595.net is a Triumph user forum. There is information from riders, all over the world on the oil issue.
I have used Mobil 20w-50 v twin oil, in a Victory Hammer(100 cu. in. six speed, with a 250mm rear tire) with good results. But, I liked the clutch performance of Rotella T Synthetic 5w40 better (3000 mile oci). You tell me.
If you use the auto Mobil 15w-50 (non-energy conserving, of course), I would definitely change it at a 2500 mile oci.
Oil analysis, has shown it shearing around this mileage. But my manual calls for 10w-40 and 15w-50, depending on climate. So shearing down to 40 weight, may not be a concern in cool weather.
I change my oil at an 3000 mile oci(severe driving), so I am on the fence about spending $50.00 a gallon for, what is probably an expensive and over priced HDEO.
But bottom line, the bike runs good with this oil. There is always that.
I am still working on this issue. Good luck with your oil quest.