# Royal Purple Duralec Ultra Diesel 10W30 CK-4 Motor Oil - 1 Gallon

Duralec Ultra combines premium base oils with Royal Purple's proprietary additive technology, Synerlec, to create a high-performance motor oil that optimizes engine performance and provides superior protection in rigorous on/off highway applications. Synerlec provides unsurpassed film strength and lubricity – up to 4X more than top competitors. In addition, advanced synthetic solvency reduces engine deposits and keeps engines clean. The net result is a better performing engine, with reduced downtime and lower cost of ownership. Royal Purple recommends for use in a variety of heavy-duty applications including commuting, over-the-road trucking, agriculture, construction and mining.

-   Extraordinary performance in older generation, high-output diesel engines
-   Maximum wear protection – up to 33% better than CK-4 requirements
-   Extended oil life – up to 40% better than CK-4 requirements
-   Improved cold flow operation and start-up protection
-   Reduced oil consumption

This Part Fits:

Year

Make

Model

Submodel

1994-2001

AM General

Hummer

Base

1997,1999-2000

Chevrolet

C3500

Base

1997-1998

Chevrolet

C3500

Cheyenne

1999-2000

Chevrolet

C3500

LS

1997-1998

Chevrolet

C3500

Silverado

1997-2002

Chevrolet

Express 2500

Base

1996-2002

Chevrolet

Express 2500

LS

1996-2002

Chevrolet

Express 3500

Base

1996-2002

Chevrolet

Express 3500

LS

1994-2001

Dodge

Ram 2500

Base

2003-2006,2009

Dodge

Sprinter 2500

Base

2003-2006,2009

Dodge

Sprinter 3500

Base

2003-2005

Ford

E-350 Club Wagon

Chateau

2003-2005

Ford

E-350 Club Wagon

XL

2003-2005

Ford

E-350 Club Wagon

XLT

1995-1998

Ford

E-350 Econoline

Base

1995-1998

Ford

E-350 Econoline

XL

1995-2002

Ford

E-350 Econoline Club Wagon

Chateau

1995-1996

Ford

E-350 Econoline Club Wagon

Chateau HD

1995-2000

Ford

E-350 Econoline Club Wagon

Custom

2001-2002

Ford

E-350 Econoline Club Wagon

XL

1995-1998

Ford

E-350 Econoline Club Wagon

XL HD

1995-2002

Ford

E-350 Econoline Club Wagon

XLT

1995-1998

Ford

E-350 Econoline Club Wagon

XLT HD

1999-2010

Ford

E-350 Super Duty

Base

2006

Ford

E-350 Super Duty

Chateau

1999-2000,2006-2008,2010

Ford

E-350 Super Duty

XL

2006-2010

Ford

E-350 Super Duty

XLT

2003

Ford

Excursion

Eddie Bauer

2000-2003

Ford

Excursion

Limited

2000-2003

Ford

Excursion

XLT

1997

Ford

F-250 HD

XL

1997

Ford

F-250 HD

XLT

2009-2010

Ford

F-250 Super Duty

Cabela's

2008-2009

Ford

F-250 Super Duty

FX4

2008-2010

Ford

F-250 Super Duty

Harley-Davidson Edition

2008-2026

Ford

F-250 Super Duty

King Ranch

1999-2003,2008-2026

Ford

F-250 Super Duty

Lariat

2018-2024

Ford

F-250 Super Duty

Limited

2013-2026

Ford

F-250 Super Duty

Platinum

1999-2003,2008-2026

Ford

F-250 Super Duty

XL

1999-2003,2008-2026

Ford

F-250 Super Duty

XLT

2009-2010

Ford

F-350 Super Duty

Cabela's

2008-2009

Ford

F-350 Super Duty

FX4

2008-2010

Ford

F-350 Super Duty

Harley-Davidson Edition

2003,2008-2026

Ford

F-350 Super Duty

King Ranch

1999-2003,2008-2026

Ford

F-350 Super Duty

Lariat

2018-2024

Ford

F-350 Super Duty

Limited

2013-2026

Ford

F-350 Super Duty

Platinum

1999-2003,2008-2026

Ford

F-350 Super Duty

XL

1999-2003,2008-2026

Ford

F-350 Super Duty

XLT

2002,2004-2006

Freightliner

Sprinter 2500

Base

2002,2004-2006

Freightliner

Sprinter 3500

Base

2006

Hummer

H1

Alpha

2002-2004

Hummer

H1

Base

2016-2019

Nissan

TITAN XD

Platinum Reserve

2016-2019

Nissan

TITAN XD

PRO-4X

2016-2019

Nissan

TITAN XD

S

2016-2019

Nissan

TITAN XD

SL

2016-2019

Nissan

TITAN XD

SV

2019-2024

Ram

2500

Big Horn

2019-2024

Ram

2500

Laramie

2019-2021

Ram

2500

Laramie Longhorn

2019-2024

Ram

2500

Limited

2021-2024

Ram

2500

Limited Longhorn

2019-2024

Ram

2500

Lone Star

2023-2024

Ram

2500

Rebel

2024

Ram

2500

Special Service

2019-2024

Ram

2500

Tradesman

2019-2024

Ram

3500

Big Horn

2019-2024

Ram

3500

Laramie

2019-2020

Ram

3500

Laramie Longhorn

2019-2024

Ram

3500

Limited

2021-2024

Ram

3500

Limited Longhorn

2019-2022

Ram

3500

Lone Star

2020-2024

Ram

3500

SLT

2024

Ram

3500

Special Service

2019-2024

Ram

3500

Tradesman

## Details

- **Price:** 183.66 CAD
- **Vendor:** Royal Purple
- **Type:** Motor Oils

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 183.66 CAD | In stock |

## Images

- Photo - Primary
- User 1
- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/royal-purple-duralec-ultra-diesel-10w30-ck-4-motor-oil-1-gallon)
> Updated: 2026-07-01