Thinking of changing my oil and filter, I used K&N HP-1006 on the FX and probably will use this again on my M.  
What oil filter do you use?
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Here is some info on the K&N's
HP-1006 (Larger replacement M35/M37/M45/M56)
Product Style: Oil Filters
Height: 3.75 in (95 mm)
Outside Diameter: 2.78 in (71 mm)
Thread Inside Diameter: M20 x 1.5
PSI Relief Valve: 11-17
Anti Drain Back Valve: Yes
Style: Canister
Weight: 0.5 lb (0.2 kg)
Product Box Length: 3.12 in (79 mm)
Product Box Width: 3.12 in (79 mm)
Product Box Height: 3.75 in (95 mm)
 
HP-1008 (M35/M37)
Product Style: Oil Filters
Height: 2.86 in (73 mm)
Outside Diameter: 2.69 in (68 mm)
Thread Inside Diameter: M20 x 1.5
PSI Relief Valve: 11-17
Anti Drain Back Valve: Yes
Style: Canister
Weight: 0.5 lb (0.2 kg)
Product Box Length: 3.15 in (80 mm)
Product Box Width: 3.15 in (80 mm)
Product Box Height: 2.91 in (74 mm)
HP-1010 (M45/M56)
Product Style: Oil Filters
Height: 3.73 in (95 mm)
Outside Diameter: 2.69 in (68 mm)
Thread Inside Diameter: M20 x 1.5
PSI Relief Valve: 11-17
Anti Drain Back Valve: Yes
Style: Canister
Weight: 0.5 lb (0.2 kg)
Product Box Length: 3.15 in (80 mm)
Product Box Width: 3.15 in (80 mm)
Product Box Height: 3.75 in (95 mm)
				
			What oil filter do you use?
---------------------------------------
Here is some info on the K&N's
HP-1006 (Larger replacement M35/M37/M45/M56)
Product Style: Oil Filters
Height: 3.75 in (95 mm)
Outside Diameter: 2.78 in (71 mm)
Thread Inside Diameter: M20 x 1.5
PSI Relief Valve: 11-17
Anti Drain Back Valve: Yes
Style: Canister
Weight: 0.5 lb (0.2 kg)
Product Box Length: 3.12 in (79 mm)
Product Box Width: 3.12 in (79 mm)
Product Box Height: 3.75 in (95 mm)
HP-1008 (M35/M37)
Product Style: Oil Filters
Height: 2.86 in (73 mm)
Outside Diameter: 2.69 in (68 mm)
Thread Inside Diameter: M20 x 1.5
PSI Relief Valve: 11-17
Anti Drain Back Valve: Yes
Style: Canister
Weight: 0.5 lb (0.2 kg)
Product Box Length: 3.15 in (80 mm)
Product Box Width: 3.15 in (80 mm)
Product Box Height: 2.91 in (74 mm)
HP-1010 (M45/M56)
Product Style: Oil Filters
Height: 3.73 in (95 mm)
Outside Diameter: 2.69 in (68 mm)
Thread Inside Diameter: M20 x 1.5
PSI Relief Valve: 11-17
Anti Drain Back Valve: Yes
Style: Canister
Weight: 0.5 lb (0.2 kg)
Product Box Length: 3.15 in (80 mm)
Product Box Width: 3.15 in (80 mm)
Product Box Height: 3.75 in (95 mm)