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How to Push Service Recommendations 101. In today's mindset of "only a certified tech can properly service your machinery" companies thrive on business opportunities like this. Heck, if I had a small business, I'd be suggesting maintenance right and left as well. Quick ... easy money. Have you ever gone into a quick lube for an oil change and found out your vehicle needs tires, shocks, coolant flush, brakes, and wiper blades seemingly before your vehicle implodes around you?