This guy is an engineer with several vids out there. I thought this may be educational for some. I didn't really know of preignition risk in low rpm high loads until recently. Enjoy!

Bought a Mazdaspeed Protege back in the day (little 2.0T engine)... my dad drove it back from Virginia for me and was on the interstate and kept flooring the car in top gear to pass people. He had never driven a turbo charged car and didn't understand the amount of stress/load it was putting onto the engine to do that vs. downshifting.

Got the car back from him and literally the next day one of the rods let go. Conclusive, no but certainly always good to downshift!

This is not just for turbo cars (except the idling down). These things seem like common sense to anyone into cars.

1. Yes, let the car warm up prior to beating on it. A common misconception here is letting the car idle to warm up which is BAD. You should start up and drive right off.

2. Yes, if you're beating on the car, going into boost, let the car idle down a few minutes to prevent coking the bearings. Oil in turbo cars gets very hot in/around the turbos center section. If you're not driving it hard in boost, just shut it off.

3. Anyone who understands an engine and how it works knows that once an engine is running it will continue to want to run. When you are at low RPM but high load, i.e. LUGGING the motor, this puts a considerable amount of stress on the rotating assemble.

Imagine trying to pedal a bike from a standstill in low gear, it would kill your legs and put a ton of pressure on your knees.

It's much better to rev a motor out than it is to lug it around. This is true irregardless of turbo/NA.

I stopped watching after that.