Been doing it every 3.5k.no problems with the bike,just wondering.

 

Just wondering what?

 

I think he is wondering how often he should change his oil.
My answer is, whenever the FSM recommends.

 

I use straight 50w in my '93 FLSTC about every 30,000 miles.

 

Are you changing the oil filter at the same time? The often that you change oil with the filter the longer the engine will last. Hope this helps.

 

Nice try

 

Yeah, should have been 3,000 miles.

 

Ditto, since no synthetic since it will just cause it to find a new leak, 20-50 conventional oil in the motor, 10-40 conventional in the primary, and new filters about every 5K or sooner if the motor oil starts to look too dirty isntead.

The only trick I do, is since I need to remove the crank position sensor so the oil filter does not screw with the sensor cable when removing the filter, I have a thin vacuum tube set up that I can fish through the crank position sensor down in front of the crank, to get the last sump oil out of the motor below the crank for the oil change.

Its not much oil, but enough to make a huge difference on how long the fresh oil will look clean on the changes, verse the last of the old oil left in the sump to make the new oil look black in 100 miles isntead. As for why HD never put a sump drain plug on either the motor, or the cam cone to get that last of the dirty oil out during a oil change, still a mystery.

 

Yeah, right, and it is also too slippery...

 

Oh i thought you were joking i dont know where you live but if you are not in a hot desert i would recommend switch to a good quality 20w50 true synthetic, im using that in my evo for years with no issues, hope to keep this engine last looooonger before a rebuild.

It's true synthetics exposes oil leaks where dyno oils clogs them because some sludge they create, but that's due worn gaskets and you are going to need replace them some day anyway