Sign Up!
Login
Welcome to Motorcycle Thailand
Monday, August 18 2014 @ 02:13 AM ICT
 Forum Index >  Motorcycle Manufacturers >  Harley-Davidson Motorcycles New Topic Post Reply
 Missing Oil
   |  Printable Version
By: Anonymous: H-D BIke ()  Monday, December 01 2008 @ 09:22 AM ICT (Read 1681 times)  
Anonymous: H-D BIke

My 2003 Harley-Davidson Road King burns about three-quarters to one quart of oil between every 5,000-mile service.

Is this common or should I take corrective action? Modifications to the motor include a K&N air filter, a Dynojet Power Commander III and Hooker tunable exhaust slip-ons.


       
  Quote
By: Anonymous: Angelo ()  Monday, December 01 2008 @ 06:40 PM ICT  
Anonymous: Angelo

I hope you're not stressing out about your Road King's oil usage; one quart or less every 5000 miles is an exceptionally low rate of consumption. Most Harley owners would be ecstatic if their Big Twin or Sportster only used a quart in half that mileage.

An air-cooled engine tends to generate higher peak operating temperatures than does most of its liquid-cooled counterparts. An air-cooled big-bore V-Twin in particular can get very hot, especially the rear cylinder; which is not exposed to as much cooling air as the front. Those high operating temps also result in elevated oil temperatures that cause the oil to thin out quite a bit. With its reduced viscosity, hot oil has an easier time sneaking past the rings and valve seals, into the combustion chambers, where it gets burned and exits with the exhaust gases.

In most of these engines, the amount of oil burned in any combustion cycle is not sufficient to create visible smoke; but over several thousand miles, that consumption can add up to a quart or so of lost oil.


       
  Quote
New Topic Post Reply


 All times are ICT. The time is now 02:13 am.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content 

Advertising


Poll

How many times have you crashed your motorcycle in the last three years?

  •  Never
  •  Once
  •  Twice
  •  Three times
  •  Four times
  •  Five times
  •  More than 6 times
  •  More than 10 times
This poll has 0 more questions.
Results
Other polls | 3,364 votes | 13 comments

TMEA MEMBER

Thai Motorcycle Enterprise Association

Events

There are no upcoming events

Motorcycle Thailand on Facebook

Motorcycle Thailand on Facebook

My Account





Sign up as a New User
Lost your password?