Synthetic Oil VS Conventional Oil

Found the video above on youtube and it explains what my article is about.
Being a mechanic I get asked this question a million times. Should I use fully synthetic oil or conventional oil? The answer is yes and no.

Both synthetic and conventional oil has their place in the oil service world. Let us start with the basics. You walk into a parts store and you ask for oil, you say to the person “ may I have a bottle of 5w-30 oil please.” What does this really mean? The first number, in this case 5, represents the viscosity of the oil in low temperature hence the W (winter) beside it. The higher number, 30, represents the viscosity of the oil at higher temperatures. FYI, viscosity is the thickness of the oil. Even though the bottles have the same grade on it, convectional oil flows a lot slower than a fully synthetic oil. This has a lot to do with the processing of the oil. Both oils essentially has same origin, crude oil, however synthetic oil goes through a longer refinement process and is broken down and then has additives added to it. These additives and detergents help the engine to combat against sludge build up and sulfur accumulation (diesel).

Lets weigh the pros and the cons of these oils.

Synthetic oil flows faster which is better for cold weather, also limits the wear and tear of you engine and gives a longer interval between oil change. How ever, as a result of its flow, synthetic oil is not recommended for high millage engines as it tends to cause oil leaks. It is also not recommended for use as a break in oil for new engines.

For further information here are a few links with some valuable information.
http://www.driverstechnology.co.uk/oils.htm
https://autos.aol.com/article/synthetic-motor-oil/
http://www.youtube.com/watch?v=lshd7WR-a6I