I completeted first oil change per M109 service manual. Attached are oil change instrucitons per M109 manual, and M109 maintenance chart. From now on, I will never pay dealer $100 to change oil on my bike...
Engine Oil:Suzuki recommends the use of SUZUKI PERFORMANCE 4 MOTOR OIL or equivalent engine oil. Use of API SF/SG or SH/SJ with JASO MA.
Suzuki recommends the use of SAE 10W-40 engine oil.
Oil Filter: per suzuki, I used OEM filter sold by DLP: http://www.directlineparts.com/product.asp?pid=8482&str=290