[arcosine]

Taking oil out of an engine is dumb, you'll wreck it. There is a reason for the oil level,
1) Cornering does not expose the oil pump pickup to air! Air is compressible, will trash the hydrodynamic bearings.
2) The oil will wear out faster, contain more contaminates between changes.
3) Oil will be hotter, degrades in Arrhenius relationship.
4) The crankshaft NEVER touches the oil in the pan at proper level anyway. (Unless your driving a Model T Ford with splash lubrication))
5) the only thing your saving is the quart of oil you didn't put in the car - false economy they say.

Hotter spark plugs will not make your car warm up faster, unless you have a fouling problem, hotter plugs will just wear out faster, give problems. Its silly to think a tiny plug could warm a whole engine. This would be good only if the car is driven on short trips where the engine does not reach operating temps.

Low octane fuel will make your car ping or retard the timing, Both bad for economy and engine longevity. High octane will gibe better mpg. This would only work if you are in Mexico and buy the cheap 70 octane fuel and baby the car..