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Thinner.
in the winter months i found in any vehicle to use 5w-30 in the winter months being that it;s a thinner oil and run 10 w-40 in the summer being that it's thicker, cuz the thicker the oil is the longer it takes to warm up and start flowing than thinner oil does during the winter months, i made the mistake by putting the thicker oil in my truck during the winter when it really gets cold and it didnt want to start at all, i had to use a forced heater to unthaw it..
Engine oil does not get "thicker" at high temperatures it gets thinner.
Use exactly what your owners manual recommends. That is more than likely SAE 10w30 which works well in all seasons.
Just use a 5w20 oil all the time. Use a thinner oil in winter if you live in a cold climate, but a 5w20 oil can be used in most all situations. In extreme cold, a thinner oil will travel up to the valve train way sooner, thus protecting your engine.
It is thinner when warmer, and thicker when colder.
In the summer 10w-30 in the winter time 5w-30. Use thicker oil in the warm, and thinner in the winter so the oil can reach the top of the head quicker in turn warming the engine faster.
Thinner weight oil flows more easily that thicker oil. Most new cars today use SAE 0w-20 or SAE 5w-20 weight oil. This weight will protect you in all temperatures. If however you drive an older car that uses SAE 10w-30 or SAE 10w-40 weight oil then you might want to use a slightly lower weight oil in extreme cold.
Heavier oil is best used during the warmer parts of the year. While thinner oil is best used during winter, as thick oil may become too sluggish in the cold.
yes it is thinner because diesel has more particles in it that petrol does which makes just that little bit thicker.:)
Gear lube is thicker than both ATF and motor oil.Gear lube is thicker than both ATF and motor oil.
No. A thinner oil would be just like water so it wouldn't stick unless it was on a slippery surface. But the thicker the oil the slippery it will be.