Oils, Fluids and Sealer› Oils, Fluids and Additives

Royal Purple

Royal Purple Duralec Super Diesel 5W40 CK-4 Motor Oil - 6 Gallon Bag-In-Box

$263.24

SKU: R022 86540

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item

Description

The Royal Purple Duralec Super SAE 5W-40 Diesel Motor Oil is a high-performance synthetic engine oil designed for diesel engines that require an emissions-compliant oil. It is formulated to maximize component life, extend drain intervals, and improve fuel performance.

This oil offers greater wear protection, superior corrosion protection, and reduces exhaust emissions. It is API-licensed CK-4 diesel motor oil and will not harm seals.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRoyal Purple
Part NumberR022 86540

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy