Ode to the full service gas station

[classicman]

If you hit potholes or drive over speed bumps your alignment CAN BE affected.

[tw]

Originally Posted by classicman

If you hit potholes or drive over speed bumps your alignment CAN BE affected.

And the supporting facts that say why are what? Posts without such facts have the intellectual value of George Jr. How does that pothole affect alignment on a properly designed car (facts that were obviously required in classicman's blanket declaration)? You would declare a fact, in obvious contradiction, without a single 'why'? Only extremists do that. Why does that pothole affect alignment when facts, with reasons why, were posted to the contrary? Are we to believe classicman only because he says so? Where are these supporting facts?

[classicman]

Originally Posted by tw

Where are these supporting facts?

Here are five for you Tom - There are a few THOUSAND MORE.
If you care to, look them up yourself.

Don't Let Alignment Problems Get Your Truck Down

DRIVER ENERGY EFFICIENCY TIPS

Automotive Vehicle Safety

Tire Care and Maintenance

Information Bulletin - Spring Driving

Originally Posted by tw

Meanwhile, when the mechanic says the check engine light mean nothing, then find a mechanic with basic technical knowledge. Another lesson that others may learn from experience. Not just that the failure happened - but also why.

You missed the point here. The point was if a driver didn't notice the light bulb or LED was NOT operational, had burned out/broken.... for whatever reason. There would be no notification of a problem that needs to be addressed.