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Good info. Actually the spark ignites the fuel several degrees before TDC.

TDC on the compression stroke ONLY!

I have used Mobil 1 and Extended Performance on 2 18 year old Toro snow blowers and a 16 hp Briggs V Twin with 150 hours on it from day 1 and never a problem. Your results may vary. Be sure you are meeting the manufacturers minimum requirements.

It's not necessary to drive the crap out of a new engine to seat the rings! You can't baby the engine though because the necessary cylinder pressure may not be developed. You need to load the engine for a short time and then coast or remove the load and then repeat the process. Accelerating from...

Most engines are run by air pressure to test them. They are run at the end of the assembly line on test rollers before the vehicle is driven to the loading area, a very limited run time. For rings to seat they must be subjected to high cylinder pressures. Today's rings generally break in quickly...

You are wrong on both counts! I worked in GM Engineering for 33 years and know what I am talking about. I also run nothing but Mobil 1 in air cooled engines and have had no problems.

How do the rings seat on all the new cars that use a synthetic on a factory fill?