Either use synthetic 20/50 or standard 20/50. Harley suggest the synthetic. The brand is whatever you prefer. Personally, i prefer standard and will not suggest any brand over another. Change every 3000 miles.
rotella t6
V6 Engine: 5W-30 V8 Engine: 5W-20
ATFV
All Sportsters have 4-stroke motors.
Unfortunately not: The 07 Sporties are EFI (fuel injected), thus requiring o2 sensors (and sensor bungholes) in the exhaust. 06 bikes, on the other hand are use a cv carb that does not need the sensors or bungs.
20W-50, I use Castrol 4T from my 06' VTX. Most motorcycles are not specific on oil types. Refer to your manual regarding any other model or displacement.
On my 06 I just removed the two nuts & bolts on each side & slid it out.
How many Qts does the 06 883c hold
My dealer is using the Mobile 5W30. My mileage is just over 80K.
30/06, 150 grain
CASTROL GPS SYNTHETIC OIL, MOBIL 1 Racing (formerly called MX4T) SYTHETIC OIL, ETC.
Unknow for 07, however 05 and 06 use 6 qts with oil filter change