I have been reading about bypass filters, and Oil analysis, but have not managed to come to a conclusion about the benifits of such a project..

My interest is in bypass filters revolve around the following Thoughts:

As it is I change the oil in my 300 TDT, about three times a year. this costs me about $100.00 per year. including oil, and filters. The car is not a pristine example, but it runs fairly well, to the best of my estimation. So that is about $33.00 per change.

Now if I was to put a bypass filter on, and switch to synthetic oil, Lets just say that the oil then could be changed once a year, so it costs about 75.00 per year. (40.00 Oil, 11.00 bypass filter, 10.00 main filter, 5.00 additional quart of oil) So there is some small potental to save $??

But then an oil analysis needs to be done from time to time.... few more $$ and does that include pulling the drain plug out, to get some of the oil out of the oil pan??? and then put the drain plug back in before too much is lost? great in theroy, but messy at best.

So I would love to spend 200.00 on putting a bypass filter on, and then be rewarded with only having to change the oil once a year (at 15,000 miles) and save a little time, a little oil, and the like.

Is that how it works?? or do those of you who have a bypass system installed, do it for some other reason. What was your motovation for putting a bypass system on the car? was it to save money or save the engine? I admit to frugality, but not at the expense of short sightedness

Thanks
Jason

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46 WDX Power Wagon

84 300TDT daily driver