ANSWERS: 19
  • It is recommended to change your oil every 2500 to 3000 miles. This will extend the life of your engine.
  • Correct...3,000 miles especially if you do a lot of stop and go driving, and by this I include bumper to bumper commuter traffic on freeways. The problem with using mileage as a unit of measurement is your car's odometer isn't adding up miles while it just sits there idling. If your car ran nonstop at freeway speeds at all times, your oil could last a lot longer, but if your car spends a lot of time sitting there going nowhere, it is still breaking down the oil while idling.
  • Many newer cars running fully synthetic oil really do not need to be changed every 3000 miles. 5000 or 6000 or even more may be just fine, depending on the type of driving you do. Some people even say that synthetic oil lubricates better after several thousand miles of use. The best way to tell is to look at the oil being drained. If it comes out clean - like when it was put in - then you can certainly leave it in longer. If it comes out significantly darker or grimer, then you should consider changing sooner. I do in fact change my oil every 3k miles to maintain the factory warranty, but I would not hesistate to change the oil more frequently if I change my driving habits or notice that the oil is dirty upon draining it.
  • The main reason oil goes bad is because it's viscosity breaks down. In other words it gets thinner. Heat cycles break down the viscosity. The more the oil goes from room temperature to operating temperature to room temperature again the faster it looses viscosity. If an engine runs constantly (like say 40 days straight) the limiting factor would be the oil filters ability to keep the oil free of dirt/deposites. If a car is taken on alot of very short trips the limiting factor will be the viscosity because of the heat cycles. Your engine manual will give you recomended changing intervals. These may vary by about 1000 miles depending on your driving conditions. Synthetic oil will always out last conventional (regular oil). Synthetic oil is not always desirable because of it's inter action with some material. Do some reaserch on your particular application and always consult the owners manual. Use of synthetics may even void your warrenty in some applications.
  • The generic interval is 3000 miles but the true interval is found in the owners' manual. Second, your particular type of driving affects when it is time for an oil change. If most of your driving consists of short trips or commutes (under 20 miles) and a lot of rush hour, stop-and-go driving then your oil changes are under the 3000 mile "severe" service schedule. Oil needs to be hot (about 1500 degrees) for maximum flow. Short trips and frequent stops do not allow for ideal oil circulation to moving parts inside the engine. However, if your commute is mostly highway driving greater than 20 miles one way with few stops and outside of rush hour traffic, oil changes can be extended a bit (about 4000-5000 miles). Finally, if your engine is serviced with synthetic oil your intervals can be extended beyond 3000 miles.
  • No wonder oil is selling for $72.00 a barrell! Change you oil every 3000 miles? What is this, the 1970's ? Changing every 5,000 miles on a new car is probably overkill. Just read your owners manual and go with what the manufacturer says. Forget the "Quiklube Center" thinking, of course they want to see you come in more frequently. With Fully Synthetic oil under normal driving conditions, changing your oil every 7,000 mile to 10,000 miles will be acceptable with most new cars.
  • Oil drain interval depends on 3 considerations: 1. The usage - mostly reflected by how far the car has moved 2. The lubricating properties - how efficient the motor oil still is to lubricate 3. How 'dirty' the oil - how much contaminants are flowing within the oil. Engine need the detergent ability in oil to stay healthy
  • to keep your engine running great for a long time you should change your oil at 2500 miles because people ignore that reminder sticker then they are over by 1000's of miles if you do that changing your oil will be frsh on your mind, also it prevents sludge which will cause you at least 2200 dollars to fix
  • Consumer Reports did a test (non-synthetic)where they compared changing oil at I believe it was 3,000 miles, and 6,000 miles of hard use. After 250,000 miles, the difference in wear was negligible. Another testing facility compared 3,000 mile to 7,000 mile oil change intervals (also non-synthetic). At 300,000 miles, they found no significant difference. This is not the 1970's, but 3,000 miles sticks in the minds of many. If you enjoy changing it, don't have kids or aren't concerned about the environment, or have fun paying someone to do it to make yourself feel as though you are doing something special for your car, then do it every 3,000. It might also make just a bit of sense for the many of you who drive a half million miles as testing was stopped at about half that mileage. The wear trend up to that point should remain consistent after, however. Then again, your valves probably won't have a good seal by then anyway. According to non oil company experts, 6,000 - 7,000 miles is very adequate for non-synthetic in almost all cases. Synthetic will of course last longer. Many guys thoroughly enjoy over-changing it, so if you get a warm fuzzy having it done more often than necessary, go for it.
  • Every 3,000 to 5,000 miles.
  • It's a good idea to do so whenever you start to squeak or rust.
  • In my experience it depends on the age of the car. A newer car will keep it's oil cleaner for longer due to better sealing piston rings and other components. As the car gets older it lets more gasses from combustion through the rings causing faster breakdown of oil. I'd say change the oil anywhere between 3k-7k miles depending on the age of the car and type of oil & filter used. It seems like some auto makers don't even know. I was reading in the owners manual of my car that it needs to be changed every 3K miles, I then read the factory service manual which states every 7K miles. They seem to contradict themselves a bit.
  • Every 3 months or 3000 miles, which ever come first.
  • 3000 miles.
  • 3000 mi./conventional oil 5000 mi./synthetic oil Class 8 truck: 15000 mi/coventional oil 25000 mi/sythentic oil
  • At least once a year. Like has been mentioned, it depends on a range of factors. Just make a note of when you last changed it, and check the oil every time you gas up. Takes 30 seconds and gives you a chance to check up on your car. If it looks new then you're good to go. If it is slightly darker then it may need a change soon. If it is black change it immediately. Simple. My two cents: The 5,000km/3 months (for those of us on the Metric system...) oil change interval was designed many, MANY years ago. Technology has come a long way since then, with engines burning cleaner and operating more efficiently. If you drive your car like a police car then stick to that. If you drive like a normal person you should be good at 8,000km or more. Just check the oil when you gas up and you will see it first-hand.
  • Depends entirely on the make & model of the vehicle. Ford light vehicles are on 12,500 miles or 12 month schedules, Peugeot & Citroens are on 20,000 miles or 12 month schedules, Kias and Toyotas are on 10,000 miles or 12 month schedules. Certain skodas are on variant schedules which are every 20,000 or 2 years. If you have purchased a used vehicle, out of manufacturers warranty I would advise Annually or every 10k Miles (which ever comes first)
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  • The obvious answer that no one here has mentioned is that the frequency with which you should change your oil depends on cost and if you plan to keep the vehicle for long. If you earn $7.25/hr then changing every 3000 miles yourself (changing the filter every-other time) is worth it. If you earn $125/hr and it takes $25 and 1/2 hour to have the dealership do it then your cost per change is $87.50 instead of $12 and it will not be economical for you to change it as frequently because an extra dozen changes costs you $1050 instead of $144 and it is cheaper to simply have the vehicle fail sooner or to sell it beforehand.

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