First change was at 571 miles, second at 1490 miles. Found the oil to look quite dirty, much more so than I expected. It should be noted that at the Triumph dealer first service they didn't drain both sumps and put only 4 3/4 qts in the bike. I called them about it, they said it was OK. I new I was going to change at around 1500 miles, so I let it be. I installed the Amsoil filter, impressed by it's effectiveness at the 20 micron level, something like 99% removal at 3/4 of a mil. partical size. Used Castrol 4T 10W40 oil, considering switching over to 20-50 next time at 2500 miles, others have said that the engine gets a little quieter with the 20-50 oils. Cooler too, but I don't understand this, usually thinner oils move better, maybe it's less friction within the engine, who know the anwer to this??
To top it all off, the Rocket is running great, open her wide in second and she's a load, haven't dared to do it in first yet. Rear tires are going edge to edge now, getting the suspension set up nicely.
Hoopla