Complimentary Oil Analysis:
Royal Petroleum provides complimentary lubricants analysis through Herguth Laboratories, in Vallejo, CA, for all of our lubricants customers. We offer tests for both diesel and gasoline powered vehicles and equipment. Several Royal Petroleum customers have spared themselves the expense of replacing an engine with the timely reporting and analysis provided by Herguth Laboratories was able to detect the problem in advance!
We stock a wide variety of premium grade lubricants and fuel for all agricultural and construction applications
