Quote:
Originally Posted by chmura
Yes 0w is extremely thin but I have faith that manufactures can develop a good engine that uses this oil.
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I don't understand how there is still so much ignorance regarding oil in 2016, especially on a board devoted to an enthusiast model.
The number before the W in an oil is the cold weight of the oil. The second number is the weight at full temp. (Cold Weight)W(Hot Weight)
Both the 0W40 and 5W40 are 40 weight oils and will have the same thickness and film strength at full operating temp. Where the 0W is SUPERIOR to the 5W is at cold start up. The 0W is thinner only at start up so the motor turns over easier and the engine has proper lubrication the moment it cranks. It is not a thinner oil overall and/or at operating temp, only at start up where you want the oil to be thin.
Also, any 0W oil will always be a full synthetic. There is no such thing as a 0W conventional.