Hi
Please be with unitl I get all answers
1-What is the different betweeen synthitec, semi-synth & synth blend oils?
2-In general: how can I compare between 2 oils or more have the same viscosity like 10w-30?
3-I read in wikipedia oil which has the highest visosity index is the best?is that true?
4-does weather temp affect on car temp or in other word on car engin temp (car engine temp will affect on oil viscosity)?
5-My frind has grand marquis (imported from America) he read in owner manual use use 5w-20, he also read in hyundai owner manual: use 5w-20 engine oil but if you in ABC area (his area) the weather is hot it is better to use 5w-30 or 10w-30. does this poin applies to his car or in general ford cars?
6-In general what is the better: fully synth oil with viscosity index 162 or synth blend with viscosity index 165?
7-If I hsve car use 5w-30 viscosity. is there any problem if I use 5w-40, 0w-40?
8-In oils characteristics flash poin means:temperature at and above which a liquid gives off enough flammable vapor to form a mixture with air that can be ignited by contact with a hot surface, spark, or flame.So how can I know engine temp to use oil has high flash point?
9-We know that oile evaporates.What is the acceptable loss? i.e. 15%, 20% or ....?(because when I measure engine oil I will know this loss is acceptaple)
Thank you for reading my questions
Please be with unitl I get all answers
1-What is the different betweeen synthitec, semi-synth & synth blend oils?
2-In general: how can I compare between 2 oils or more have the same viscosity like 10w-30?
3-I read in wikipedia oil which has the highest visosity index is the best?is that true?
4-does weather temp affect on car temp or in other word on car engin temp (car engine temp will affect on oil viscosity)?
5-My frind has grand marquis (imported from America) he read in owner manual use use 5w-20, he also read in hyundai owner manual: use 5w-20 engine oil but if you in ABC area (his area) the weather is hot it is better to use 5w-30 or 10w-30. does this poin applies to his car or in general ford cars?
6-In general what is the better: fully synth oil with viscosity index 162 or synth blend with viscosity index 165?
7-If I hsve car use 5w-30 viscosity. is there any problem if I use 5w-40, 0w-40?
8-In oils characteristics flash poin means:temperature at and above which a liquid gives off enough flammable vapor to form a mixture with air that can be ignited by contact with a hot surface, spark, or flame.So how can I know engine temp to use oil has high flash point?
9-We know that oile evaporates.What is the acceptable loss? i.e. 15%, 20% or ....?(because when I measure engine oil I will know this loss is acceptaple)
Thank you for reading my questions
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