HKS Super Boxer Racing Oil 10W-40 4 L - 52001-AK131

HKS Super Boxer Racing Oil 10W-40 engine oil, part number 52001-AK131, 4 L.

• Grade: 10W-40; stock grade W40
• Volume: 4 L (this part number); the grade is also made in 1 L (52001-AK130)
• Target: horizontally opposed engines with a bolt-on turbo and/or increased boost
• Enough oil film strength with a viscosity that reduces noise at low temperature; 10W-40 was chosen because the short-stroke, large-bore aluminum block can make piston-slap noise when cold
• API and ACEA ratings: not stated on the HKS Japan pages

Fitment

• Engines named: FA20 (supercharged or bolt-on turbo), EJ2#, FB2#, etc. (Source: HKS Japan)
• Engine oil, no vehicle-specific list. (Source: HKS Japan)

HKS resources:

• HKS Japan Super Racing Oil series page
• HKS Japan engine oil part number list

Contact us if you are unsure of fitment or Size HERE