#1
★ Top Pick
Valvoline 4-Stroke Motorcycle Full Synthetic 10W-40 Motor Oil 1 Quart
Valvoline's full synthetic 10W-40 is a solid match for the Street Triple because Triumph specifies 10W-40 for most riding conditions, and this oil meets that requirement while handling the engine's fairly high-revving 765cc triple without thinning under heat. The 1-quart size works for top-ups between changes without committing to a full case. Caveat: always verify it meets Triumph's JASO MA2 friction spec before using it in a wet-clutch application.
View on Amazon ↗