QUOTE(delsoo @ Aug 22 2016, 12:12 PM)
http://www.castrol.com/en_gb/united-kingdo...sity.html\
This is confusing, i am not sure which type of oil is better ? 10w40 ? 20w50 ?
The front number represent the viscosity of the oil when it's cold , the number behind means the viscosity of oil when it's hot ?
Did you read your owner's manual? It tells you what oil viscosity (like the 10w30, 15w40, 20w50 grades you can use). This is confusing, i am not sure which type of oil is better ? 10w40 ? 20w50 ?
The front number represent the viscosity of the oil when it's cold , the number behind means the viscosity of oil when it's hot ?
You got the second sentence right the first number stands for Winter, and the number behind represents the viscosity during operating temperature (hot). For more info, watch this, really good info on viscosity and synthetics vs mineral oil.
This post has been edited by LemonKnight: Aug 22 2016, 01:52 PM
Aug 22 2016, 01:45 PM

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