31.   Most search engines have a link to a search tips page that explains techniques to optimize a search on that particular engine.

32.   Most search engines have many dead links and outdated information, and searches are often inaccurate, returning many false matches.

33.   Properly designed Stirling engines have two power pulses per revolution, which can make them very smooth-running.

34.   Stirling engines have low maintenance.

35.   Subaru says the engine has inherently little vibration, and the six is indeed smoother and quieter than the four.

36.   Subaru also asserts that the flat engine has inherently low vibration.

37.   The cars are slower, the engines have a little less power, the tires are somewhat tougher, and the track is worn down some.

38.   The engines have a sealed cylinder with one part hot and the other cold.

39.   The engines have overhead valves and an overhead cam.

40.   The engine has eight models with varying thrust rates.