Synthetic Motor Oil mileage?

My A%26amp;P instructor said that if you put fully synthetic motor oil in most modern cars, it will last for easily 10,000 miles before changing. Is this true?Synthetic Motor Oil mileage?
Dear Oil-





Lets have a little chat here.





In any event the oil is not the part that you have to worry about wearing out. Whether its a Synthetic or a Natural Base Stock.





What you have an issue with is the additive package that is formulated with the oil at the time of manufacture.





This additive package over time becomes over loaded with soot and other contaminants from the combustion cycle within the engine. This creates not only soot but also acid compounds. These acid compounds combine with the natural condensation of water in the air that is drawn into the engine block.





When the additive packages in the oil are no longer functioning properly these acid compounds combine with this condensation to form engine sludge. This sludge will locate itself in lower portions of the engine where circulation is poor or non-existant and start damaging the parts in that area.





If one of these locations is near an engine main bearing, then you will eventially destroy the integrity of this bearing and destroy that part of your engine. This in turn destroys the engine itself.





Your A%26amp;P Instructor is used to working on aircraft that are highly maintained. Cars on the other hand live in a far different environment than aircraft.





Cars are constantly plagued by stop and go traffic, long periods of idle time, slow and low RPM Driving, starting and shutdown, heating and cooling, sudden starts and stops, dusty environments, extreme heat, and cold, long periods of being unmaintained, the list is almost endless.





Aircraft however, are not subject to the same conditions. Their engines do suffer in the same ways in which a car engine suffers. Their extremes are different, and Areo-Shell 15w-50 weight is a product that meets the needs of Aircraft Engines.





Ahh, did not know you would run into someone who knows about both worlds did you! Its OK, I have an A/S Degree in Automotive Technology, but I worked part time in a Shop in at the Salinas Airport working with an A%26amp;P.





I found out that Piston Aircraft Engines are exactly like car engines, just better maintained. And I have to say that I am glad the FAA has those requirements for aircraft. I only wish those same requirements applied to cars as well.





Just for the record, dont get caught in the Amsoil Myth either. They say you don't have to change their Synthetic Oil either for 10,000 miles. However, they only back that warranty up AFTER you have purchased THIER very expensive filter adapter kit and installed it on your car.





Just keep to our rule of thumb and you will probably never have an issue. Every 3000 miles or 90 days, whichever occurs first.





You are keeping the garbage out of your engine doing this.





Lastly, don't switch brands of oil to suit what is on sale. That is an excellent recipe for the build-up of engine sludge too. What ever brand you choose, just stick with it.





FYI, I still use the Aero-Shell 15w-50 in my cars! Its expensive, but its the best oil out there!





Good Luck!Synthetic Motor Oil mileage?
That's a pretty strong statement. Most vehicles require oil changes at 5k, Mobil 1 synthetic is recommended at 7500 miles. Keep in mind these are recommendations. Everyone in my family owns a Lexus and we all change your oil every 7500 to 8k and this is suffice. Going further is questionable.
yes that's true,Mobil one will last that long for sure ,i know this because i use it,but i usually don't go that far on it,i change it around 8 thousand,but it will last really good,its the best oil made that you can put in any engine right now,it wont hurt it if it has to go ten thousand ,i see a lot of them that don't get it changed until it has at least ten thousand on it,good luck with it.
Yes, and here is why, it’s all about shear strength and molecular bonding. Shear strength measures how the oil wears over time. You see oil never “breaks down” but it does wear out. When you are talking about shear you are talking about the oils resistance to being scrapped off metal. The higher the shear the greater the resistance. With regular oil the hydrocarbons will shear or separate over time. In synthetics there are no hydrocarbons but rather microscopic size ball bearings held in place by, what basically can be called, a glue. Instead of bonding these bearings roll over each other giving the synthetic oil a five to ten times greater resistance to shearing allowing parts to smoothly glide over them. They also hate the idea of bonding with carbon elements so instead of bonding with the combustion waste they carry it away to the oil filter and bottom of the oil pan. This also helps reduce the sludge build up in an engine.
I have to agree to the last response is isn't always the strenth of the oil that is the problem with doing this, soot and carbon will wear your rings down as well as your cylinder walls. 3k miles period, if you can't afford to change it then I wouldn't suggest you drive. Synthetic is the best of the best when performance is concerned and you live where the weather warrants it but once you go synth. you can't go back and synthetic is a little expensive.
Check out Amsoil synthetic. Its actually recommended for change intervals of 1 year or 25,000 miles. Here's a link to an eye opening article on extended drain intervals, includes comments from GM: http://www.amsoil.com/redirect.cgi?zo=14…


Europeans have been going 10,000 miles or more for years. BMW's are up to 15,000 now.





browse Amsoil's products here: http://www.amsoil.com/redirect.cgi?zo=14…