The short answer
VIOC is Valvoline Instant Oil Change — the drive-through oil change chain. The four cryptic letters plus a store code (like LB0134) make it one of the most-Googled 'mystery' charges, and it's virtually always a real oil change.
Why it shows up like this
The 22-character descriptor field turns 'Valvoline Instant Oil Change' into its initials plus a location code. If you (or whoever drives the household car) got an oil change recently, this is that.
Don’t recognize it? You might still
- The initials bear no resemblance to the sign at the shop.
- A spouse or kid took the car in and paid with the shared card.
- Upsells (filters, wipers, coolant) push the amount above the advertised oil-change price.
What to do, in order
- Ask who serviced the car Match the date to the sticker on the windshield — the mileage reminder sticker is your receipt.
- Decode the store code if needed Valvoline support can map the code (like LB0134) to a specific location.
- Dispute only after ruling out the household A VIOC charge with no oil change in the family means a cloned card — treat as fraud.
Quick questions
Why doesn't it say Valvoline?
The card network's descriptor field fits about 22 characters, so chains abbreviate. VIOC = Valvoline Instant Oil Change; the suffix is the store number.
Independent reference — not affiliated with Valvoline Inc.. Billing names and policies change; verify with the merchant or your bank before acting.
Reviewed Aug 3, 2026 · high · About ChargeDecoder