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Gasbox Bolt-On Horseshoe Oil Tank for 1965-Up Harley Four-Speed Swingarm Frames
28 reviews $299.99

Lowbrow Customs Horseshoe Oil Tank for Lowbrow Customs Weld-On Sportster Hardtails and Gasbox Full Frames
50 reviews $311.99

Lowbrow Customs Dished Clamp-On Steel Motorcycle Oil Tank for Harley Sportster Hardtails
19 reviews $267.79

Gasbox Bolt-On Oil Tank for Rigid Harley-Davidson Big Twin Frames with Electric Start
1 review $299.99

Mooneyes MC Motorcycle Chopper Oil Tank for Harley-Davidson Choppers
10 reviews $395.00

Choppahead Clamp On Aluminum Oil Tank - 1954 - 1970 Triumph 650 - Finned Ends
10 reviews $293.33

Cycle Standard Oil Temperature Dipstick OEM #62668;828-87 Harley-Davidson 1984-99 Softail FXST FLST 1979-2003 XL
29 reviews $36.28

Choppahead Aluminum Oil Tank With Finned Ends - Raw Finish - for Harley-Davidson Choppers
4 reviews $253.79

Lowbrow Customs Aluminum Gas Filler Cap with Weld-In Steel Bung - Vented
9 reviews $50.19

Lowbrow Customs Stock Style Triumph Oil Tank Feed Filter OEM #82-3179
33 reviews $56.40

Lowbrow Customs Dimpled Steel Motorcycle Oil Tank for Triumph Choppers
30 reviews $224.94

Mooneyes 4 quart Traditional Chopper Oil Tank for Harley-Davidson Choppers
6 reviews $375.00

Lowbrow Customs Aluminum Gas Filler Cap - Vented
6 reviews $33.02

Cycle Standard Direct OEM Replacement Chrome Oil Tank for 1965-1982 Harley-Davidson 4 Speed Models
2 reviews $164.94

Mooneyes 3 quart Traditional Chopper Oil Tank for Harley-Davidson Choppers
9 reviews $325.00

Lowbrow Customs Brass Gas Filler Cap - Vented
7 reviews $43.59

Gasbox Horseshoe Bolt-on Oil Tank for Harley-Davidson 1952-78 Harley Sportster XL
13 reviews $299.99

Cycle Standard Oil Temperature Dipstick OEM #62635-79 Harley-Davidson 1970-84 Big Twin 1984-94 FXR 1987-92 FLT 1970-78 XL
12 reviews $36.37

Lowbrow Customs Brass Gas Filler Cap with Weld-In Steel Bung - Vented
10 reviews $57.82

Lowbrow Customs Aluminum Gas / Oil Filler Cap - Unvented
6 reviews $27.68

Mooneyes Cast Aluminum MOON Oil Tank Mounting Brackets
2 reviews $116.67

Lowbrow Customs Domed Steel Motorcycle Oil Tank for H-D Sportster Big Twin and Universal Choppers
23 reviews $224.94

Lowbrow Customs Dimpled Steel Motorcycle Oil Tank for H-D Sportster Big Twin and Universal Choppers
29 reviews $224.94

Lowbrow Customs Brass Gas / Oil Filler Cap - Unvented
10 reviews $36.98

Led Sled Customs Derby Oil Tank for Harley-Davidson Choppers
5 reviews $199.95

Hawg Supply No Mess Oil Drain Valve For Harley-Davidson 5/8-18 thread
1 review $59.99

Cycle Standard Oil Temperature Dipstick OEM #62896-00 Harley-Davidson 2000 & Up Softail
19 reviews $36.14

Colony #7500-2 Oversize Timing Plug/Oil Tank Plug & Tap Kit 11/16-16 Thread - Chrome Plated
$46.35

Lowbrow Customs Rubber Mount Bracket Kit for Lowbrow Oil Tanks - for 500 / 650 c.c. unit Triumph Motorcycles - Aluminum Washers
21 reviews $64.25

Colony #7354-2 Chrome Plated Oil Tank Cap & Dipstick 1 1/4-20 Thread 1936-1954 Stock Harley-Davidson Tanks - Chrome Plated
8 reviews $27.50

Colony #9602-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Knucklehead/Panhead- Chrome Plated
2 reviews $19.97

Colony #2908-2 Oil Tank Filler Cap and Gauge 1941-1964 Harley-Davidson Big Twins - Parkerized
$71.50

Colony #2297-1 Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twin - Zinc Plated
1 review $8.80

Prism Supply Co. Blade Style Push-in Oil Plug - Polished
$59.99

Cycle Standard Replacement Oil Tank Cap Harley-Davidson OEM #62644-84T
7 reviews $14.54

Colony #3544-3 Oil Line Nuts 1915-1964 Harley-Davidson All Models OEM #3581-15 - CAD Plated
$14.52

Prism Supply Co. Blade Style Push-in Oil Plug - Tumbled
$54.99

Colony #2808-1 Oversized Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twins - Zinc Plated
6 reviews $8.80

Lowbrow Customs Lowbrow Customs Horseshoe Oil Tank Upper Tab Mounting Kit - 1952-1981 Sportster Hardtail
1 review $15.09

Lowbrow Customs Aluminum Gas / Oil Filler Cap with Weld-In Steel Bung - Unvented
4 reviews $43.59

Colony #9206-12 Oil Tank Bracket to Frame Mounting Kit - 1958-1964 Harley-Davidson Panhead - CAD Plated
$20.70

Colony #3150-4 Oil Tank Bolt Mount Kit 1958-67 Harley Davidson Sportster XL — Colony #3150-4 Oil Tank Bolt Mount Kit 1958-1967 Harley-Davidson Sportster XL - Parkerized
2 reviews $33.00

Colony #3037-8 Oil Tank Mounting Kit 1936-1957 Harley-Davidson Big Twins - Parkerized
$15.73

Lowbrow Customs Lowbrow Customs Horseshoe Oil Tank Upper Tab Mounting Kit - 1982-2003 Sportster Hardtail
6 reviews $15.09

Lowbrow Customs Lowbrow Customs Horseshoe Oil Tank Upper Tab Mounting Kit - 2004-2022 Sportster Hardtail
$15.09

Colony #3047-3 Oil Line Vent Line Fittings Pre-1965 Harley-Davidson Twins - Parkerized
$13.94

Colony #3482-1 Oil Return Elbow L1962-1965 Harley-Davidson XLCH 1965-1967 FL/FLH- CAD Plated
$27.50

Colony #7355-2 Oil Tank Cap & Dipstick 1-5/16-12 Thread - Chrome Plated
1 review $27.50

Colony #9667-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Kuncklehead/Panhead - Parkerized
$13.40

Colony #8493-2 Oil Tank Drain Plug 1981-Up Harley-Davidson Big Twin - Chrome Plated
1 review $12.34

Colony #3244-1 Oil Tank Mounting Bracket 1966-1969 Harley-Davidson XLCH - Parkerized
$20.90

Colony #3792-4 Oil Return Line Ground Wire Clamp 1936-1940 Harley-Davidson Big Twins/45's
$20.90

Colony #3158-14 Oil Tank Mount Kit 1958-1965 Harley-Davidson XLCH/XLR 1952-1967 KR/KRTT - CAD Plated
$10.29

Gasbox Replacement Hardware for Gasbox Horseshoe Bolt-On Oil Tank for 1965-Up Harley Four-Speed Swingarm Frames
$6.66

Colony #9503-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM# 2326-38 - CAD Plated
$8.80

Colony #9714-1 Oversize Timing Oil Tank Plug Harley-Davidson - Parkerized
$8.80

Colony #9404-1 Oversize Harley-Davidson Timing & Oil Tank Plug - CAD Plated
1 review $8.80

Colony #9861-2 Custom Hex Transmission Fill Plug/Dip Stick - 1987-Up Harley-Davidson Big Twin - Chrome Plated
1 review $17.14

Gasbox Replacement Hardware for Gasbox Horseshoe Oil Tank for Lowbrow Customs Weld-On Sportster Hardtails and Gasbox Full Frames
$13.45

Colony #2807-1 Oversized Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twins - Chrome Plated
1 review $12.10

Colony #9502-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM #2326-38 - Chrome Plated
$9.56

Colony #8115-1 Timing Plug/Oil Tank Plug OEM #704 1952-1969 Harley-Davidson FL and XL - CAD Plated
3 reviews $8.80

Colony #3069-3 Oil Tank Vent Pipe Nipple Kit 1937-1973 Harley-Davidson 45s/Servi-car - CAD Plated
1 review $7.26

Colony #9950-6-P Oil Hose Cover Mounting Kit Smooth Allen 1999-Up Harley-Davidson Twin Cam 88 Dyna/FLT - Chrome Plated
$6.38

Gasbox Replacement Oil Tank Mount for Gasbox Horseshoe Oil Tank for Lowbrow Customs Weld-On Sportster Hardtails and Gasbox Full Frames
$5.51

Gasbox Replacement Oil Tank Strap for Gasbox Dished Clamp-On Steel Motorcycle Oil Tank for Harley Sportster Hardtails
$4.41

Gasbox Replacement Hardware for Lowbrow Customs Dished Clamp-On Steel Motorcycle Oil Tank
$0.85

Gasbox Replacement Hardware for Gasbox Bolt-On Oil Tank for Rigid Harley-Davidson Big Twin Frames 1936-57
$5.78

Gasbox Replacement Hardware for Gasbox Horseshoe Bolt-on Oil Tank for Harley-Davidson 1952-78 Harley Sportster XL
$19.55

Custom Motorcycle Oil Tanks for Harley A motorcycle oil tank does one job on a dry-sump Harley or Triumph: hold and circulate the oil that the frame no longer stores internally. Construction quality matters here more than on most parts, since a ta...

Custom Motorcycle Oil Tanks for Harley

A motorcycle oil tank does one job on a dry-sump Harley or Triumph: hold and circulate the oil that the frame no longer stores internally. Construction quality matters here more than on most parts, since a tank running dry or leaking oil at speed is a real mechanical risk, not just a cosmetic issue.

Capacity and Fitment by Model

Harley-Davidson Big Twins (Panhead, Shovelhead, Softail, and similar models) and XL Sportsters typically run oil tanks holding 3 to 4 quarts. This collection covers weld-on, bolt-on, and clamp-on mounting styles across a wide range of years, from 1936 Big Twins through 2022 Sportster hardtails, along with dedicated hardware for K, KH, and XLCH models.

Materials and Styles

Steel oil tanks in dimpled, domed, and smoothie styles cover most Harley chopper builds, while aluminum options, including finned Choppahead tanks and classic hot-rod-style Mooneyes tanks, suit a more polished custom look. Triumph and BSA riders have dedicated dimpled and domed steel tanks built with the correct fittings for the OEM-style Triumph oil feed filter and return T fitting.

Mounting Hardware and Fittings

Beyond the tanks themselves, this collection covers oil tank mounting hardware, brackets, oil line fittings, filler caps, drain plugs, and dipsticks for specific year ranges. Fitment is closely tied to frame type and mounting style, so check the product listing to confirm the tank and hardware match your bike's exact year and model before ordering.

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Oil Tanks FAQ

How much oil does a Harley or Sportster oil tank hold?

Harley-Davidson Big Twins and XL Sportsters typically use oil tanks with a 3- to 4-quart capacity. Exact capacity varies by tank style and model year, so check the product listing for the specific oil tank you're considering.

What's the difference between a weld-on, bolt-on, and clamp-on oil tank?

A weld-on oil tank is permanently welded to the frame, a bolt-on tank attaches using existing frame mounting points without welding, and a clamp-on tank is secured with a strap or clamp. The right mounting style depends on your frame and hardtail setup.

Will a Harley oil tank work on my Triumph or BSA?

Not directly. Triumph and BSA motorcycles need oil tanks with the correct fittings for the OEM-style Triumph oil feed filter and return T fitting, which differ from Harley oil tank fittings. This collection includes dedicated oil tanks for British motorcycles.

Should I choose a steel or aluminum oil tank?

Steel oil tanks in dimpled, domed, and smoothie styles work well for most Harley chopper builds and are the more common choice. Aluminum tanks, including finned Choppahead or Mooneyes styles, offer a different look for a more polished custom build.

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