Comments by "John Burns" (@johnburns4017) on "Motor Oil Myths u0026 FAQs - Synthetic vs Conventional" video.

  1. It is best you pour in the viscosity the makers state and make sure it is "fully" synthetic and conforms to the latest API which is now SN I believe. Thinner oils have to be "fully synthetic", as they are the only oils that can handle it. Thinner oils are meant for less resistance and better fuel consumption. Thinner oils also get to the bearings quicker on start up, when the oil has drained down after the car is standing for a while. Thick oils are a big problem on starting especially in winter. The problem is getting oil to the bearings fast enough as the oil is very thick at low temperatures. That is where fully synthetics shine. They do not become too thick in very cold temperatures starving the bearing of oil on start up. In place like northern Canada using a 0W oil is near essential as the oil can get so thick when the engine is cold. Fully synthetics also have far greater "shear", that is the resistance to be compressed, keeping metal surfaces apart. Fully synthetics last longer as they break down far slower. A mineral oil can be broken down substantially after 1,000 miles. Fully synthetics resist and are stable at great heat. They were developed for jet aircraft. Mobil 1 had an advert in the 1990s of two frying pans on a stove, one with fully synthetic in the pan and one mineral oil. They left the burners on. The mineral oil ended up black, burned, dry, hard and caked up. The fully synthetic was still as it was after igniting the burner. This is relevant as all engines have hot spots which will burn mineral oil, hence caked oil forms in parts of the engine. When engines idle and oil and coolant are not being pumped around fast enough it can cause engine hot spots and burning of mineral oil. Avoid semi-synthetics as many are con. The synthetic part may only be 5-10% of the oil. Only drop from a fully synthetic to a semi when the engine is using oil. So in short, Get the viscosity your engine needs and pour in a high quality "fully synthetic" and have the latest API number. The highest API numbers are always "fully synthetic" oils. Do not go on old wives tales and the comments here is full of them.
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  2. +Hydrogen Sh You need to understand the difference between mineral and synthetic oils.
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  3. Hydrogen Sh Read my other post on this.  If you are saying there is no difference in mineral and fully synthetic then ...well.....
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  4. Joe User Lubrication qualities of "fully synthetic" are just vastly superior, irrespective of your experiences with poorer quality oil. Only fully synthetics reach API SN. SN is the highest protection. In parts of the European Union it if difficult to find a 100% mineral oil. Most makers stipulate a semi-synth as minimum.  Take note of what I write and apply. Fully synthetic oil is NOT expensive.   My comment still applies.... "Do not go on old wives tales and the comments here is full of them."
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  5. Joe User The best protection API is only met by fully synthetics. That says it all. No one who knows anything about oil uses mineral oil. Go into any store in the UK or Germany and you will not see mineral oils on the shelves.
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  6. Joe User I really do know what I am on about.
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