Engine longevity comes down to oil condition, cooling, and not ignoring small faults. Most wear happens in the first moments after a cold start, before oil pressure reaches the top of the engine, which is why short trip driving is harder on an engine than distance suggests.
Why is engine wear highest right after start up?
At start up, oil has drained back to the sump and the upper valve train is running onwhatever film remains. Full pressure takes a few seconds to arrive, and cold oil flows moreslowly. That brief window accounts for a disproportionate share of total engine wear.
Two things help. Use the viscosity the manufacturer specifies rather than a heavier one, asmodern engines rely on thin oil reaching narrow passages quickly. And avoid heavy throttleuntil the temperature gauge has moved, since a cold engine has tighter clearances and thickeroil at exactly the moment you are asking most of it.
Lifespan of Your Car's Engine: Questions
What shortens the lifespan of your car's engine most?
Cold starts and short trips shorten the lifespan of your car's engine most, because most wear happens before oil reaches the top of the engine.
Does warming the engine up help?
Driving gently for the first few minutes helps more than idling, which warms the engine slowly.
Which maintenance matters most?
Oil changed on time, a healthy cooling system, and fixing small faults such as misfires before they cause bigger damage.

