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  2. Two-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_engine

    Two-stroke engines often have a higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines can also have fewer moving parts, and thus be cheaper to manufacture and weigh less. In countries and regions with stringent emissions regulation, two-stroke engines have been phased out in ...

  3. List of U.S. states by standard octane ratings - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_by...

    Most states do not mandate certain standard gasoline grade octane ratings.In the United States and Canada, octane ratings are in AKI, commonly shown as "(R+M)/2".All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance.

  4. Two- and four-stroke engines - Wikipedia

    en.wikipedia.org/wiki/Two-_and_four-stroke_engines

    The two crankshafts are connected with a special transmission that rotates the four-stroke crankshaft at twice the speed of the two stroke crankshaft. In the M4+2, the advantages of both engines being connected are obvious; the pistons of the engine working in one combustion cylinder are set opposite to each other but in different modes ...

  5. Texas has the cheapest gas in the country, but where does ...

    www.aol.com/texas-cheapest-gas-country-where...

    Here's where Austin ranks among major Texas cities. A recent study shows that Texans are getting better deals at pumps than any other state. Here's where Austin ranks among major Texas cities.

  6. Cam engine - Wikipedia

    en.wikipedia.org/wiki/Cam_engine

    Some cam engines are two-stroke engines, rather than four-stroke. In a two-stroke engine, the forces on the piston act uniformly downwards, throughout the cycle. In a four-stroke engine, these forces reverse cyclically: In the induction phase, the piston is forced upwards, against the reduced induction depression. The simple cam mechanism only ...

  7. The safest cars in 2025 - AOL

    www.aol.com/finance/safest-cars-2025-163000675.html

    Safest Small Cars 2025 Mazda 3. The stylish Mazda 3 has a lot to offer compact-car shoppers, including great looks, a composed driving experience, and reasonable fuel economy from its base 2.0 ...

  8. Stroke (engine) - Wikipedia

    en.wikipedia.org/wiki/Stroke_(engine)

    The induction stroke is the first phase in a four-stroke (e.g. Otto cycle or Diesel cycle) engine.It involves the downward movement of the piston, creating a partial vacuum that draws an air-fuel mixture (or air alone, in the case of a direct injection engine) into the combustion chamber.

  9. Viewer's guide to the new College Football Playoff

    www.aol.com/sports/viewers-guide-college...

    First-round players to watch, keys to the game. For the first time ever, there will be College Football Playoff games on campuses. Notre Dame-Indiana will get things started on Friday night before ...