The 5 and 30 refer to the relative viscosity of the oil when it is cold (5W) and when it is hot (30W). A 5W-30 oil behaves like a 5W thin viscosity oil when the engine is cold, and it behaves like a 30W thicker viscosity oil when the engine is hot. A very thin viscosity is undesirable in a hot engine. In very high temperature situations, an even higher viscosity range, up to 50W, might be called for. Always go by the engine manufacturers recommendations.
30 is a little more viscous (thicker) at operating temperature than 20.
5W30 is not only okay, it is recommended.
In a cold engine, 10w30 is heavier; however, in a warm engine, both should be the same weight - 30.
owners manual says to use 5w 30 motor oil
Either is acceptable. I use 5w30
Warm climate, 10W-30. Cold climate, 5W-30.
SAE 5w30 oil is an oil designed for cold and warm temperatures. It is basically a 5 weight oil when it is cold and becomes a 30 weight oil when it reaches full operating temperatures.
I have a KA and my boyfriend has a Ford Fiesta and i do believe both take the Semi synthetic 5w30 engine oil. Hope this helps :)
The recommended oil viscosity is 5W-30 or 10W-30. 5W30 weight if it's going to be 0°F (-18°C) or above.
According to the 2000 Lincoln Navigator Owner Guide ( 5W-30 )