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Originally Posted by rossi46
WHY WHY WHY ????
First I don't understand why you would want to go 10k with out an oil change
Second why change the filter, it will out last the oil
During combustion there is a lot of acidic build up in the oil, not to mention sulfer, carbon, so on and so forth. Needless to say there is some nasty stuff floating around in there. Changing your oil 3000 miles is your best defense, and rather cheap insurance. just my 2 cents
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BECAUSE! BACAUSE! BECAUSE!
First. There is nothing magic about a number! Depending on your driving style and conditions and the lubricant used you may change at 2K or 10K or 20K. The only way to truly know is to have the oil analyzed. I picked 10K because, with syn it seems to be a nice safe number. I''ll have it analyzed and let you know what the results are.
Secondly. I believe the oil will outlast the filter. The oil remains clean until the filter becomes too loaded with particulates to keep the oil clean. As far as filtering is concerned, the filter fails and then the oil does.
Lastly. I refer to my first comment. You say there is "nasty stuff floating around in there". But, it is only a factor when it overcomes the lubricating properties of whatever you use. Hence, the need for analysis. It's no doubt safer to change at 3K. It would be even safer to change every 1K. Or, after every drive to the convenience store. It's a question of economics vs peace of mind. I would chose to trust experts to tell me the real world situation with my chosen lubricant and then make my decision as to whether I include margin of error or a fudge factor when I drain and fill.