1. Four-Stroke Gasoline Engine (front view) intake valve exhaust valve spark plug engine block connecting rod crankshaft piston

2. low octane simulation starts here

3. Intake Stroke PHASE

4. Intake Stroke PHASE

5. Intake Stroke PHASE

6. Intake Stroke PHASE

7. Intake Stroke PHASE

8. Intake Stroke PHASE

9. Compression PHASE

10. Compression PHASE

11. Compression PHASE

12. Compression PHASE

13. Compression PHASE

14. Compression PHASE

15. Compression PHASE

16. Power Stroke PHASE

17. Power Stroke PHASE

18. Power Stroke PHASE

19. Power Stroke PHASE

20. Power Stroke PHASE

21. Power Stroke PHASE

22. Exhaust Stroke PHASE

23. Exhaust Stroke

24. PHASE Exhaust Stroke

25. PHASE Exhaust Stroke

26. PHASE Exhaust Stroke

27. PHASE Exhaust Stroke

28. Return to Start

29. High octane simulation starts here

30. Intake Stroke PHASE

31. Intake Stroke PHASE

32. Intake Stroke PHASE

33. Intake Stroke PHASE

34. Intake Stroke PHASE

35. Compression PHASE

36. Compression PHASE

37. Compression PHASE

38. Compression PHASE

39. Power Stroke PHASE

40. Power Stroke PHASE

41. Power Stroke PHASE

42. Power Stroke PHASE

43. Exhaust Stroke PHASE

44. Exhaust Stroke

45. PHASE Exhaust Stroke

46. PHASE Exhaust Stroke

47. PHASE Exhaust Stroke

48. PHASE Exhaust Stroke

49. Return to Start

50. Step-through mode starts here

51. Intake Stroke PHASE

52. Intake Stroke PHASE

53. Intake Stroke PHASE

54. Intake Stroke PHASE

55. Intake Stroke PHASE

56. Intake Stroke PHASE

57. Compression PHASE

58. Compression PHASE

59. Compression PHASE

60. Compression PHASE

61. Compression PHASE

62. Compression PHASE

63. Compression PHASE

64. Power Stroke PHASE

65. Power Stroke PHASE

66. Power Stroke PHASE

67. Power Stroke PHASE

68. Power Stroke PHASE

69. Power Stroke PHASE

70. Exhaust Stroke PHASE

71. Exhaust Stroke PHASE

72. Exhaust Stroke PHASE

73. Exhaust Stroke PHASE

74. Exhaust Stroke PHASE

75. Exhaust Stroke PHASE

76. Return to Start