2010 engine break in period?

[cdydjded]

Originally Posted by Hershey

Then why does TOYOTA have a break in period that suggests a certain type of driving in the owners manual ?

I nor anyone here can intelligently answer that question. None of us are Toyota engineers. I can tell you this, engines today are built completely different than 40yrs ago. Fuels, oil viscosities are all 100 times better than the 1970's. Most engines today are aluminum as opposed to cast iron. We have fuel injection & ECU's that control everything. Cant compare 1970's to now.

[RedRide]

Originally Posted by cdydjded

I nor anyone here can intelligently answer that question. None of us are Toyota engineers. I can tell you this, engines today are built completely different than 40yrs ago. Fuels, oil viscosities are all 100 times better than the 1970's. Most engines today are aluminum as opposed to cast iron. We have fuel injection & ECU's that control everything. Cant compare 1970's to now.

Yes but, piston rings and cylinder walls are still cast iron or cylinder walls are plated with a better weaing metal than what is used for the block.
Even if the block is aluminum, it still has a cast iron/plated cylinder sleeve. Bearing and crankshafts for example are still made basically the same

Basically, the only thing made of aluminum are non wear items and critical bearings/mating surfaces are stiil cast iron or steel.
Aluminum an other alloys are used prmarily just to save weight, not for better wear properties.


Granted, oil is much better but, parts still have to wear in to one extent or another.

Capice?