Can the K&N save me some gas?....

no, a 4 cylinder Honda can though.

thats best for the X5 I think!

only if you take it to a gas station and say "I'll trade you this filter for some gas".:rofl:

why dont you just use less oil for kn filter or dont use oil at all. i never had problems in past 8 years driving bmw's with sport filtes...and never use oil on filter. Some manuals also say dont put filter into oil can ;) just spray it slightly... ;)

try this ;) :

http://cgi.ebay.com/ebaymotors/ws/eB...155158141&rd=1

Yes, the add cleverly states that the filter is better than other performance media, but is it as good as OEM? Remember, the job if a filter is to keep contaminates out of the engine. It is difficult to believe a filter can increase air flow dramatically and still filter as good as OEM. If there were a better filter wouldn't BMW design it in?

Yes and for a few reasons:

http://www.europeanautosource.com/im...comparison.jpg

- Pliable progressive polyurethane seal
- 100% polyurethane construction
- Deepest pleats in the industry
- Minimal wicking
- Factory pre-oiled with non-surfactant containing refined oil
- Washable/reusable cotton gauze media

http://www.europeanautosource.com/im...010015/4oe.jpg

aFe also has a different pleat geometry than others with rounded tips. Others (and OEM) are more triangular and pointed. This rounded design allows the air to flow more efficiently around the tops of the pleats.

so tom, i have an 01 X5 4.4i, do you recommend oil or dry? Which is better?

Popular choice are the oiled filters - they are preoiled from the factory so yo ucan simply drop them in place once received. :thumbup: