If your oil is too thick to spread accurately, the problem is that you are using an incorrect oil, not that your motor is cold. Oil --must-- work even when is c

If your oil is too thick to spread accurately, the problem is that you are using an incorrect oil, not that your motor is cold. Oil --must-- work even when is cold. If your area reaches -40F in winter you will need a "0 Winter 30" oil grade; or 0W/30, that is more expensive but very thin so it will not freeze 5W/30 will work until -31F 10W/40 will not freeze until 0F. This is the standard grade used for both winter and summer in many temperate areas If you use the 15W grade for tropical areas in cold places, the oil could be too thick, will freeze at night and lose their properties. If you start the car without warming it first, you will probably damage your engine and your oil pump will suffer. Change it ASAP to the lower viscosity grade that could be managed by your engine (or keep the car in a warmed garage until spring. Your car, your choice). Check the owner manual. A too thin oil will lubricate worse. If you live in hot climates, 10W and 15W will perform better in summer Diesel vehicles will care of warming the diesel before to start and will refuse it unless the diesel is warm enough. If starting the car at morning takes ages, some of your glow plugs are probably broken and will need to be replaced. This can be a delicate operation. If stuck don't force it, go to a professional with the correct tools. Old plugs can be fragile and if they break inside the engine, it will be a very expensive mistake.