Service Requests All-Inclusive Generator Services At API Engineering, we offer a wide range of services. Our services are efficient, and we also take up regular maintenance programs to help you run your generators smoothly. General Services Field Services Resistive/Reactive Load Test Services Generator Installations & Removals Fuel Management & Fuel Filtering Fuel Maintenance Services Inspections (Monthly, Quarterly, Semi-Annually & Annually) Fuel Maintenance Consultation Top Off Service Fuel Analysis Fuel Filtering Fuel Treating Fuel Sampling Contamination Testing Request a Service