Carrier profile · USDOT 912679 · Updated Jun 13, 2026
Davidson Oil Lubricants LP
DBA MADDEN OIL COMPANY
2 power unitsLIBERAL, KS50/100
AUTHORITY STATUS UNKNOWNHAZMAT
Identity & Federal
The official FMCSA identity — legal name, DBA, addresses, contact, officers, and registration — alongside the daily-captured federal-record activity feed, monitored daily by Vektor.
Location
- Physical address
- 211 S KANSAS AVE, LIBERAL, KS, 67901
- Mailing address
- PO BOX 148, LIBERAL, KS, 67905-0148
- Operation
- Interstate· Hazmat
Contact
- Phone
- (620) 624-1961
- Cell
- (620) 629-0034
- Fax
- (620) 624-6905
- maddenoil@swko.net
- Web domain
- swko.net
Registration
- Officers
- Kenny Sizemore · Dyke Rogers
- USDOT / docket
- 912679
- First registered
- Oct 24, 2000
- Last MCS-150
- Mar 6, 2015 · 104,000 mi (2013)
- FMCSA safety rating
- Not rated
- D-U-N-S
- 10111
Fleet (self-reported · MCS-150)
MCS-150 filing history· biennial-update cadence
Per-filing MCS-150 history (each biennial update + the fleet/mileage it reported) is being captured from the daily federal feed and will appear here as we capture the full history.
Federal record activity· monitored daily by Vektor
No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.