You'd have to use a lot of CDN$18 filters to make up for the cost of your time to change these. If the average filter is CDN$9 and you change oil every 5000km that's 32 oil changes.

So you will spend under CDN$320 on premium oil filters if I've guessed right. Is your free time worth CDN$40/hour?

Or do you mean a new filter every 10000km which is then 16 filters, or costing you roughly CDN$160 over that 160000km period.

Just some thoughts.

TB

Tony Boner
Personal: 98cdw27@charter.net Work: tony.boner@sun.com
Saving the computer world from WinBloze as Unix/Solaris/Java Guru http://www.sun.com
1998 Contour SVT Pre-E1 618/6535 Born On Date: 4/30/1997
Now with Aussie Bar induced mild oversteer.