Regular gasoline engines might take a few cranks to get started for a lawnmower/generator, a car has its spark plugs that have to turn over. But in a hybrid, combustion just starts and stops so seamlessly.
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Modern engines are a lot lighter to get going
A small 1.5-2L engine has a lot less rotating mass than an older 3L+ engine did. They’re also generally built with lighter materials because we care about weight and the cost isn’t prohibitive since Hybrids are already more expensive, this makes them even easier to get up to speed. We’re also using wayyy thinner oils which are easier to get going, and even thinner when warm.
Basically, making engines light and easy to spin also made them better engines so we did that and as a side effect they start easier
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