Greg’s Petroleum Service Inc.

Is a local, family owned and operated fuel and oil distributor. Since opening in 1961, our commitment to deliver value through customer service, high quality products, reliability, and safety has set us apart.

And as our company continues to grow, family remains at the heart of how we think, how we treat our customers and how we treat each other. Here’s a quick look at how our story began, and how our dedication to serving you and your business has gotten us to where we are today.

1950

THE BEGINNINGS

THE BEGINNINGS

Harold “Greg” Gregory started his career in petroleum at Ray Pratt’s gas station in Delano, CA.

1961

BECOMING PARTNER

BECOMING PARTNER

Harold went to work at Ken Teague’s Standard Oil Distributorship, where he became a partner of the business, selling Chevron fuel and lubricants.

1963

BUYING THE BUSINESS

BUYING THE BUSINESS

Harold bought Ken Teague’s Standard Oil Distributorship. His superior work ethic and genuine concern for his customers set the foundation for what our Company has become today.

1979

NEXT GENERATION ENTERS

NEXT GENERATION ENTERS

Ron Mariani first came to work for his father-in-law, Harold, as a fuel driver.

1984

ESTABLISHING OUR NAME

ESTABLISHING OUR NAME

Standard Oil changed its name to Chevron Corporation, & Greg’s Petroleum Service was established.

1985

STARTED CARDLOCK BUSINESS

STARTED CARDLOCK BUSINESS

Began offering fleet fueling services to our customers.

1990

NEW PRESIDENT APPOINTED

NEW PRESIDENT APPOINTED

Ron became President, CEO and the owner of the Company. Learning the business from the ground up, he has always had a deep appreciation for doing things the right way and has continued to build the company around the pillars that value hard work, integrity, passion and community.

1993

FAMILY BUSINESS GROWS

FAMILY BUSINESS GROWS

Kelvin Gregory, son of Harold Gregory, grew up helping his father with the business. He returned in 1993 as Sales Manager. He prides himself on building business relationships based on honesty, integrity and standing behind his word.

2010

NEW LOCATION

NEW LOCATION

Opened a new warehouse in Bakersfield, CA to support our company growth and reach to current and new customers.

2012

BECAME A VALVOLINE SUPPLIER

BECAME A VALVOLINE SUPPLIER

Started selling Valvoline lubricants, a premium motor oil brand since 1866.

2016

3rd GENERATION ENTERS

3rd GENERATION ENTERS

Ron’s son, Greg, joins the team as Marketing Manager before transitioning into Sales Manager and is excited to be a part of the family legacy.

2017

NEW FACILITY IN BAKERSFIELD

NEW FACILITY IN BAKERSFIELD

Opened brand-new custom facility with office, CFN Cardlock fueling location, warehouse, and a bulk storage facility.

2018

NEW LOCATION

NEW LOCATION

Opened a new warehouse in Fresno, CA to improve our ability to efficiently serve the Fresno area as a commercial fuel and lubricants supplier.

2021

CONTINUED GROWTH

CONTINUED GROWTH

Greg transitioned into General Manager as the company continues to grow and evolve. His knowledge and experience will play a major role in the future of our company; helping improve operational efficiency, sales and leading our team into the next generation.

2022

NEW LOCATION

NEW LOCATION

Acquired Blackburn Oil Company, a family-owned enterprise that has been supplying petroleum products to the agricultural and commercial industries since 1969. This acquisition enhances our service levels with new employees, equipment, and location.