Mercury – 25W-40 4-Stroke Oil Change Kit | L6 Verado Series | Marine-Grade Components | 8M0188359Mercury 25W 40 4 Stroke Oil Change Kit L6 Verado Series Marine Grade Components 8M0188359 Overview Theres something deeply satisfying about giving your outboard the kind of care that keeps it running strong season after season. When youre cruising offshore or sliding into a quiet cove, you want the comfort of knowing your engine is protected from the inside out. An oil change may not be the flashiest part of boating, but its one of those simple