Just about every single automotive diesel engine sold since the 1950s is equipped with glow plugs, so the above post might be confusing. Automotive diesel glow

Just about every single automotive diesel engine sold since the 1950s is equipped with glow plugs, so the above post might be confusing. Automotive diesel glow plugs do not ignite the fuel; they lower the required compression in cold weather by warming up the air going into the combustion chamber. They're not the same things as glow plugs found in methanol-fueled model engines, which also do not ignite the fuel directly, but serve as a catalyst so the methanol can combust via compression instead of electric ignition. When talking about glow plugs, it's important to specity the sort you're talking about and the context in which your discussion is taking place.