Customers don’t go to the shop as frequently as they once did
I’m using some back-of-the-napkin math here drawn from government statistics, but the average number of miles traveled annually in America has climbed from something like 9,900 in 1971 to 13,664 in 2022. An oil change, lube job, and rotation of bias-ply tires used to be the item that would bring a customer to the shop every 3,000 miles, so in 1971 that average driver in the average car would be at the shop three times a year.
But today? Maintenance intervals keep heading north due to better metallurgy, better design, and response to customer preference. Today, tires are often the limiting factor for service intervals—Michelin recommends 6,000-8,000 mile rotations, for instance. Modern oil change intervals are often between 10,000 and 15,000 miles, and if your customers are like mine, many motorists will push the rotations out that long, knowing that doing so won’t sideline the car.
In states with an annual safety inspection, once a year is usually how often a car comes in, often getting its next scheduled maintenance at the same time. Repairs will punctuate this schedule, but that hasn’t changed much over the years.
That means once a year is about when a car is going to get looked over, often by a lube tech or C-level mechanic who is likely rushing and may not take the time to lubricate front end parts—if he even knows to check for serviceable pieces, because those aren’t in play on most vehicles in 2023.
Under those circumstances, Dave told me, sealed chassis parts shine. And you know what? I think he’s right. Fuel injection did a pretty good job supplanting the carburetor. Sealed hub assemblies aren’t repairable, but they require a lot less service than tapered roller bearings ever did. And after thinking about that confluence of factors, a sealed chassis part might be exactly what I install the next time a customer I see too infrequently rolls into the shop.