Join Date: May 2014
Location: Washington State
If you have been riding out when it was cold enough that the motor oil seldom got hot enough to boil out the condensation and extra fuel, this is to be expected. A bike doesn't have a thermostat like a car. Being air cooled it has cooling for a 120 degree day all the time and the oil does not warm up enough on cold days, even with extended riding, to remove the water from condensation and products of combustion or extra fuel thatt builds up in it..
When it is cold out your EFI system has the "choke" on to some extent all the time to make the motor run properly also. So you get even more fuel contamination than normal in the oil because of this.
Diesel rated oils have a special additive package to better protect a motor from moisture build up than conventional oils. Moisture and fuel still builds up in the oil but those oils control the rust better. They are a better choice for winter riding or wet climates. You still need to dump the oil more often in cold riding to get the fuel that builds up out though. There is just less of a chance of having a problem with internal rust if you run them.
If you don't ride when it is cold and you have not had your bike stored somewhere where it is wet like outside with a tarp over it, etc you might have some other issue so far as far as the fuel smell. The oil color comes from moisture contamination though.
presently owned bikes
2014 XC 8 ball that no longer stalls
1993 HD fxrp
1982 HD Sturgis
2009 Honda rebel
1991 gl1500 A w/ Champion Daytona 2+2 sidecar.
"God works both good and evil in a mans' life and you deal with it as best you can" Somebody..
Last edited by Joe_; 03-03-2018 at 11:48 AM.