How much time or how many miles should I wait to change my engines synthetic oil?

the same as the extended service interval on your car.


Oil change intervals with synthetic oil


Synthetic oils withstand higher temperatures before breaking down, and have more base stock and less viscosity modifiers. Synthetics wear out, become acidic, and eventually become saturated with suspended soot particles, just like regular oil. Again, an oil analysis is a good investment to determine the optimum oil change interval. Never exceed the manufacturer requirements for normal service.





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.How much time or how many miles should I wait to change my engines synthetic oil?
BIGTHINGS, If your car is still under factory warranty, abide by their drain intervals. If you hammer a lot of miles on your car in a relatively short period of time It's perfectly OK to stretch the mileage to the maximum recommended by your manufacturer. If your car is out of it's warranty period and you're using an extended drain interval full synthetic Mobil1 says 15,000 miles.





Sorry, but I don't agree with Amsoil's claim of 25,000 mile drain intervals with oil filter changes every 12,000. This is fool hardy, particularly if you live in a cold climate and do a lot of stop and go driving.How much time or how many miles should I wait to change my engines synthetic oil?
Synthetic oil has a change interval every 5k miles, The syn based oils are less likely to wax up in the colder weather than mineral oils and do not break down like conventional oils do. Some oil manufactures claim as 7500k mile interval which is not recommended by top technicians. It is safe to say that a 5k mile change will be sufficient for your application
3000 miles... is the standard.. although manufactureres start using synthetic oil and they say that you can go 7500 without oil change... i dont trust them.. because they just want to make money... though synthetic oil breaks down less compared to regular oil.... you still want to change oil early.... over time the oil becomes dirty and has many wear and tear particles in it.. that oil filter may or may not catch..
usually 6,000 miles or about 10 months