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changing oil

Originally posted by: CasioTech
but only put on 2500 miles. Do I have to change it? Do oil's really need to be changed at 3k miles?
Click to expand...

Thought I read somewhere that changing oil every 3 months was a myth.
 
I dunno, the sticker was up last april, hah but I always go by milage. It's not synthetic. Changing oil every three months is a myth?
 
miles has more to do with it than time. Go by what yiur car's manufacture says not the local lube shop (it's in thier best interest to say every 3000miles)
 
Originally posted by: CasioTech
I dunno, the sticker was up last april, hah but I always go by milage. It's not synthetic. Changing oil every three months is a myth?
Click to expand...

Just a quick look at Google brings up this:

The vehicle manufacturer specifies which grade of oil should be used for the vehicles it produces. The manufacturer also specifies how often the oil changes should be made. For example, most people in the United States believe that a common oil change frequency should be every 3000 miles or every 3 months, whichever comes sooner. This 3000 mile oil change interval has been relentlessly promoted by oil changing companies for decades. It had a scientific basis when engines used non-multi-weight, non-detergent oil. It no longer has any scientific basis, but it is still being promoted by certain entities, most notably the oil change industry in the United States (including car dealerships). Indeed, studies have shown more wear occurs with fresher (1000-2000 mile) oil. This is attributed to additives re-establishing themselves, TBN converging, and filters becoming more efficient. Most manufacturers recommend oil change intervals of 6,000 miles or more for modern cars. In Europe, by contrast, where the influence of oil companies has been much less, oil is typically changed only at a major service interval, between 10,000 and 15,000 miles for a modern car. For convenience, the oil filter is usually also replaced at the time the oil is changed. There are many types (or sizes) of oil filters for vehicle engines. Vendors of oil filters have information on which type of oil filter is compatible with a given vehicle.

http://en.wikipedia.org/wiki/Motor_oil
 
i thought synthetic was standard in europe?

i dunno. short trips are worse for the oil though, something about less time to heat up so more water vapor or whatever, so maybe you should change it.
 
? old oil is not better. changing the oil at insane intervals is only bad because the stuff that burns off in the first miles is bad for your catalytic converter or something.

"Tom: Water vapor is a by- product of combustion. And inevitably, some of it ends up inside the engine's crankcase. And if you do mostly short-distance driving (which we suspect you do, since you have a 1991 car with only 51K on it), the engine never really heats up enough to evaporate and purge that water."
http://www.cartalk.com/content/columns/Archive/1998/May/13.html
 
I'd change it.

Unless you have it analyzed, it's always a guess. But when it comes to something like engine oil, it's better to guess on the safe side.

The oil in my Dad's Camry was still good after 9 months and 5500 miles, but the Mobil Delvac 1300 Super 15W-40 we run is considerably more robust than most conventional oils.
 
You change oil because if it is doing what it is supposed to do, like mopping up all the bad stuff (tiny metal shavings and crap like that), then you are recirculating them over and over. I'd say that 10,000 miles is good for cars over 20,000 miles. But on a new car, do every 4,000 miles or so, until the engine breaks in.
 
Just change the filter.

Is it possible to change just a filter without draining all the oil. I'm guessing that the pan is lower than the filter on most cars, so would the amount of oil that usually runs down my arm while taking the oil filter off be the same.
 
I haven't done a LOF in my car for 6.5 years. I paid for a lifetime LOF package for $400. Sweet deal for me. I'm about to have my 21st free oil change in 67000 miles.
 
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