Whats the difference between syntenic car oil and normal oil ?

In composition


service time


etc....Whats the difference between syntenic car oil and normal oil ?
Wow !!! Previous poster seems very knowledgeable, but he is mistaken about the value of synthetic oil. Synthetic oil does not breakdown in the same way as conventional oils do. They last a much longer time. They are more resistant to damage from heat and they have better lubricating qualities. They also flow freer at lower temps than conventional oils and reduce cold engine wear and tear. Conventional oils have several different additives to reduce acid formation, oxidation and thermal breakdown. Synthetic oils have the same types of chemicals as additives, but the base product does not have the weaknesses as the petroleum oil before the additives. Synthetic oil will also give you better fuel mileage over the life of your car, less wear on start up, and cleaner internals. I spent 25 years working with mineral oils and synthetics in cars, airplanes and industrial applications. I have started and overseen oil analysis programs and can tell you first hand that synthetic oils are more efficient and last longer than conventional oils when used correctly. Good luck!!!By the way just checked the source from previous poster and it sems that the site hasn't been updated since 2002, some of the links are not even operable. Previous poster does do a good job of copy and paste though!!Whats the difference between syntenic car oil and normal oil ?
NONE! unless you have a high performance engine or are in a super cold Climate.





Virtually all modern multi-weight oils are detergent oils. Detergent oil, cleans the soot of the internal engine parts and suspends the soot particles in the oil. The particles are too small to be trapped by the oil filter and stay in the oil until you change it. These particles are what makes the oil turn darker. These tiny particles do not harm your engine. When the oil becomes saturated with soot particles and is unable to suspend any more, the particles remain on the engine parts. Fortunately, with the current oil change intervals the oil is changed long before the oil is saturated.





Non-detergent oil, such as SAE 30, is not used in modern passenger vehicle engines. It is still used in some gasoline engines such as lawnmowers.





Synthetic oil was originally developed for high performance racing engines. Mobil tried to popularize synthetic oil for passenger vehicles back in the early 1970's. At the time, Mobil was promoting 20K or 25K oil changes with synthetic, but they soon backed down from this. Synthetic oil is a good choice if you have a vehicle with a high performance engine (in fact synthetic is required for many of these engines). It is also a good choice if your vehicle is operated in extremely cold climates. It has higher resistance to breakdown caused by heat and it flows better in extreme cold. Unfortunately for the synthetic oil industry there is virtually no advantage to using synthetic oil in a non-high performance engine that is operated in moderate climates. You probably could go a bit longer between oil changes with a synthetic, i.e. following the normal service schedule even if you fall into the severe service category, but I wouldn't advise this. In short, synthetic may give you the peace of mind of knowing that you are using an oil that is far better than necessary for your vehicle, but it won't reduce wear or extend the life of the engine. The mistake some people make it to wrongly extrapolate these benefits onto normal engines operated in mild climates, with the ultimate lack of any knowledge being manifested with statements such as ';synthetics provide 'Peace of Mind,' or 'Cheap Insurance,''; or other such nonsense.





Summary





1. Don't fall for the 3000 mile myth or the dark oil myth





2. Follow the manufacturer's recommended change interval for severe service or have an oil analysis performed to see if you can use the normal service interval





3. If you do the oil changes yourself then buy the oil and filters near the date of the oil change and keep a maintenance log with receipts





4. Use an API certified 5W30 or 10W30 oil (whatever your manual says is preferred) and watch out for oil change places that force 10W30 on you





5. Don't use oil additives





6. If you really want to know the optimum time to change your oil than have oil analyses performed





7. Use the manufacturer filter or a quality after-market filter (don't go by brand name recognition!)





8. Synthetic oil is a good choice if you have a high performance engine or if you live in an extremely cold climate, otherwise it provides no benefit (but no harm either).





9. Avoid engine flushes





10. Check your oil
ask the dealer what oiil with a variable weight can u use for your car.....if u use a normal sae 30w is not good for starting in the winter, you will need one with sae 5w-30w or 0w-30w.... The two different weight are provided to compare to the regular oil. (one when tmperatures..at start, do not remember exacly what are the temperatures, maybe 0 degre Celsius (the first one) and the second one is the weight at temperature of normal running engine.....So you will understand, a normal oil at normal running engine temperature will have a weight of 30..( I compare the weight with vascosity)... At 0 C degree defenetly your oil should be thicker, and therefore it takes more efort to run it trough the engine.....but still the regular oil they say is 30 sae.... ( in weight at 0 celsius degree I would assume is100w just a bigger number I pulled out.). Now the standard they do, is they compare the regular oil with the syntetic at 0 C degree a synetic oil will have less viscosity lets say probablly same vascosity that a hot oil regular oil have , and by comparation, with a regular oil that syntetic is lighter, easier to run....and they make it standard.... The first number is the thicknees at cold temperarture, when u start the car, u need it to have it low in cold weather, second one is the thickness at normal temnperature operation.... that would have to comply with specifocation of your car....i know Bmw, does not use syntetic, but are some syntetics oil that can be use for you car.....If u can not find one....use an hyperlubrificant aditive that will provide lubrefiation for your engine parts: duralube, slick50 but i sugest only Motorkote... you will save on gas also





Ps: syn oil is normal oil with a certain percent of additives in, to keep its proprieties longer, and to keep the sooth and viscosity better at extrem ends temperture...cold starts or overheatting