We offered full service on all 2500-5500 service class trucks. With a dedicated staff member for service work we are able to get the job done while you wait. Quality lubricants is important but frequency is more important we recommend 5K for engine oil and 10K for fuel filters Especially with older trucks. That being said Quality lubricants can defiantly prolong the life of your engine and its components and thats why here at left Coast Livermore we offer Both a synthetic blend (phillips 66 Guardol )as well as We are your local AMSOIL dealer bringing top class synthetic lubricants to our customers.Fleet services is always welcome.