Canon Pg 40 Black Ink Cartridge Review

My first PG 40 lasted only 2 months, disappointing as cartridge cost was one of deciding factors in buying my Canon Pixma MP 170. $20 (Staples) was low compared to previous printer cartridge but not for two month usage. With next cartridge, I used "fast" print option and continued to use for 12 months after "low ink" message appeared, this one lasted 56 months, which is o.k. for cost. I then had one refilled at Cartridge World and it lasted only 45 days, tho I was doing somewhat more printing during that time period. Use "fastdraft" option,and ignore low print message, just print till its out of ink and it will last much longer. I will probably buy from Amazon as cost is lower (providing you order $25 and get free S & H) and this is hard to find in my area. http://garyadair.com/324484