HKS SUPER BOXER RACING OIL 10W-40 4L-Motor Oils-HKS
Click to zoom in

HKS SUPER BOXER RACING OIL 10W-40 4L

HKS
HKS52001-AK131
4957266455913
Motor Oils
18 Units In Stock - Ships Next Business Day
Engine, HKS, Motor Oil, Oil Systems
$ 125.00
$ 125.00

SKU: 52001-AK131 | UPC: 4957266455913

HKS SUPER BOXER RACING OIL 10W-40 4L for Subaru Impreza WRX STI 2004-2021

HKS Super Boxer Racing Oil 10W-40 4L delivers fully synthetic ester-based lubrication tailored for high-revving Subaru boxer engines. This 4-liter racing oil fits Impreza WRX STI Legacy Forester models with EJ20 EJ25 FB engines offering reliable protection during track sessions. It maintains film strength under extreme heat and load for consistent engine performance.

Key Features

  • Ester Synthetic Base: Delivers thermal stability up to 150°C with low evaporation for sustained protection in racing conditions
  • Shear Stability: Retains viscosity during high shear rates ensuring reliable lubrication at 8000+ RPM
  • Low Friction Formula: Reduces internal drag for power gains and smoother operation in boxer configurations
  • Cold Start Performance: Flows quickly at low temperatures while resisting breakdown at high temps
  • Anti-Wear Additives: Protects bearings cams pistons from metal-to-metal contact in high-load scenarios

Product Notes

  • Intended for competition use in off-road or track environments
  • Change oil every 3-5 hours of track time or as per engine builder specs
  • Ships as non-hazmat via ground standard carriers

Installation Notes

  • Professional installation recommended.
  • Drain engine completely warm replace filter before filling to 4L capacity
  • Compatible with standard Subaru oil filters no special hardware needed

This Part Fits

Year Make Model Submodel
2004-2007 Subaru Impreza WRX STI
2008-2014 Subaru Impreza WRX STI
2015-2021 Subaru WRX STI
2005-2009 Subaru Legacy 2.5 GT
2004-2013 Subaru Forester XT
2002-2007 Subaru Impreza WRX

Why Choose HKS?

  • Proven in Japanese motorsports like Super Taikyu endurance racing
  • Formulated with real-world track data from Subaru engines
  • Precision-engineered additives for boxer engine demands

Frequently Asked Questions

  • Q: Does this fit my 2017 WRX STI EJ257 engine?
    A: Yes fully compatible with EJ20 EJ25 boxer engines in WRX STI models providing optimal protection for turbocharged setups
  • Q: What base oil type is used?
    A: 100% synthetic ester base oil blended with PAO for racing-grade thermal shear resistance
  • Q: What is the recommended change interval?
    A: Every 3-5 hours track time or 3000 miles street use monitor via oil analysis

Shipping & Handling

  • Method: UPS Ground
  • Availability: In stock - ships same or next business day
  • Packaging: 4L metal canister in protective box 11 x 9 x 7 inches
  • Weight: 9 lbs

Request For Information

Have questions about HKS SUPER BOXER RACING OIL 10W-40 4L? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
HKS

HKS

HKS Japanese performance parts for Toyota Supra, Nissan Skyline GT-R, Nissan Silvia and 240SX, Subaru WRX and STI, and other JDM platforms are stocked at Black Ops Auto Works. Shop turbo kits, cat back exhaust systems, coilovers, blow off valves, and engine management upgrades for RB26DETT, SR20DET, 2JZ-GTE, and EJ series turbocharged engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 607 HKS SKUs across forced induction, exhaust, suspension, and engine management categories. What This Collection Covers HKS has built its reputation on Japanese sport compact and sports car performance since the late 1970s, developing turbo kits, exhaust systems, and suspension for platforms including the Toyota Supra 2JZ-GTE, Nissan Skyline GT-R RB26DETT, Nissan Silvia and 240SX SR20DET, and Subaru WRX and STI EJ and FA series engines. This collection brings together fitment verified HKS pa...

View HKS Products
Motor Oil

Motor Oil

Motor oil for cars, trucks, SUVs, motorcycles, and diesel platforms is stocked at Black Ops Auto Works. Shop full synthetic, high mileage, break-in, racing, and diesel-rated motor oils in quarts, gallons, 5 gallon pails, and bulk bag-in-box sizes for daily drivers, boosted performance builds, and fresh engine break-in. Every product is filterable by viscosity, formulation, and package size so the correct oil ships the first time. Black Ops Auto Works carries 311 motor oil SKUs across synthetic, diesel, racing, and break-in formulations. What This Category Covers The Motor Oil collection spans daily-driver synthetic oils, diesel-rated heavy duty oils, motorcycle oils, dedicated break-in oil for fresh engine builds, and racing oils formulated for high RPM and high heat. Viscosities range from 0W20 and 5W20 for modern fuel-efficient engines up to 20W50 and straight SAE 50 for older, high performance, and track applications. Categories Included Full synthetic motor oil, synthetic bl...

View Motor Oil Products
Oil Systems

Oil Systems

Oil system parts for supercharged HEMI, LS and LT platforms, diesel trucks, and daily drivers are stocked at Black Ops Auto Works. Shop oil catch cans, air oil separators, oil filters, oil pans, oil pumps, oil pickups, dipsticks, drain plugs, and motor oils for Hellcat, Redeye, Demon, Jeep Trackhawk, Ram TRX, Corvette, Camaro, CTS-V, Mustang, F-150, and Silverado applications. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 1,432 oil system SKUs across catch cans, filtration, and service hardware. What This Category Covers Oil system parts manage crankcase ventilation, filtration, and lubrication delivery throughout the engine. This collection spans oil catch cans, oil separators, air oil separators, oil filters, oil pans, oil pumps, oil pickups, dipsticks, drain plugs, oil baffles, and motor oils for street, track, towing, and high horsepower applications. Crankcase Ventilation...

View Oil Systems Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×