The 2018 Harley-Davidson FLHTK Electra Glide Ultra Limited features Engine: Twin-Cooled Milwaukee-Eight 107 V-Twin, Fuel Capacity: 6.0 gal. This trim includes Twin-Cooled Engine — Uses liquid-cooled heads; the standard Ultra Classic (FLHTCU) used only oil-cooling in 2018.. Owner note: Requires 3-hole service (Engine, Transmission, Primary). Engine oil capacity is approx 5.0 qts with filter. Known concern: Oil Sumping — Addressed by TSB M1450; often fixed by installing the 2020+ updated oil pump.. Learn more about this ride →
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