What oil for 2004 sportster do you use?

Harley calls for the following oils.

99851-05
Formulated for use in Harley-Davidson® Transmissions (except VRSC™ models) and the following Primary Chaincase applications: '71-later XL, '83-'84 XR1000, and '84-later Big Twin models with wet type diaphragm spring clutch.

SYN3 99824-03.00QT
Formulated for Harley-Davidson® Engines, Transmissions and the following Primary Chaincase applications: '71-later XL, '83-'84 XR1000, and '84-later Big Twin models with wet-type diaphragm spring clutch.

Note about SYN3 Lubricant:

• Can be used in the engine, primary chaincase, and transmission.

• Offers improved film strength for superior wear protection at high temperature, and improved deposit control for a cleaner engine, transmission, and primary chaincase.
• Is formulated for reduced oil consumption, improved wear protection, high temperature detergency, and superior overall field performance.
• Provides high temperature film strength, which means the lubricant maintains film thickness in high power output and high engine speed conditions, keeping the metal parts from rubbing against each other and resulting in less wear.

Will the use of SYN3 lengthen my service intervals?
No, we recommend that you still follow your owner's manual for the proper service schedule for your vehicle. (change every 5000 miles) $$

or

Amsoil 20W-50 MCV

• Reduces Friction, Heat and Wear
  
• Provides Extreme Pressure Quality Protection for Gears and Chains
  
• Delivers Superior Rust Protection
  
• Provides Excellent Wet Clutch Performance
  

Service Life
Recommended for use up to twice the motorcycle manufacturer change interval (miles/hours) or one year, whichever comes first, in engines, transmissions and primary chaincases. (up to 10,000 miles) $

Hope This Helps.

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