Motul 8100 Power 5W-40 Engine Oil – 1L / 5L

Motul 8100 Power 5W-40 engine oil is a premium ester-based lubricant engineered for high-performance Subaru builds and aggressive street or track applications.

Designed to perform under high heat, heavy load, and aggressive driving conditions, 8100 Power delivers strong oil film strength, stable oil pressure, and consistent protection where standard oils begin to break down.

Built as a high-performance 100% synthetic formula inspired by motorsport, this oil is ideal for tuned WRX and STI setups, street-driven performance cars, and upgraded turbo builds that require a serious 5W-40 option.

Performance tier

High tier – street / track performance

Developed for tuned engines, upgraded turbo setups, and aggressive driving conditions where strong protection, heat resistance, and consistency are required

Variants

1 liter
Best for top-off use and keeping an extra bottle on hand
Commonly used as an add-on for performance oil services

5 liter
Best for complete oil changes on most subaru applications
Recommended for tuned street cars and weekend track use

Features

100% synthetic ester-based formula
Strong oil film strength for high load and temperature conditions
Maintains oil pressure under demanding use
Excellent shear stability for consistent performance
Helps protect against LSPI in modern turbocharged direct injection engines

Fitment

Subaru WRX 1992–2021
Subaru STI 1994–2021
EJ and FA engine platforms

Compatible with stock, tuned, and built engines that require 5w-40 viscosity

Specifications

Type: 100% synthetic ester-based
Viscosity available: 5w-40
Available sizes: 1 liter / 5 liter
API standard: SP
Brand: Motul

How much do you need

Most subaru engines require approximately 4.8 quarts of oil

Recommended pairings

Motul gear 300 75w-90
Motul rbf 600 or rbf 660 brake fluid
Motul motocool coolant