Maxima ProPlus+ 10W-40 128oz is a premium 4-stroke motorcycle engine oil designed for riders who want consistent protection, smooth shifting, and reliable performance under everyday and high-load riding conditions. Built for modern 4T engines, it supports stable lubrication across a wide temperature range while helping reduce wear during aggressive acceleration and extended run time.
This high-quality 10W-40 motor oil is engineered to maintain strong film strength and dependable viscosity stability, helping protect critical internal components from heat and friction. Its performance-focused formulation is ideal for motorcycles and powersports engines that demand clean operation, dependable clutch feel, and long-lasting engine durability.
With a large 128oz / 1-gallon size, ProPlus+ is a smart choice for frequent maintenance, multi-bike garages, and riders who prefer stocking up on a trusted 10W-40 4-stroke engine oil for regular service intervals.
Bottle Size: 128 oz / 1 Gallon
Viscosity: 10W-40
Application: 4-Stroke Motorcycle & Powersports Engines
Oil Type: Pro Performance Motor Oil
Maxima ProPlus+ 10W-40 128oz 4-Stroke Motorcycle Engine Oil
📦 Shipping Info:
We offer free shipping on all helmets and orders over $100 within the lower 48 states. Most orders ship within 1–2 business days and arrive in 3–5 days.
Some items may ship directly from our warehouse partners, allowing us to offer a broader selection at competitive prices.

















