Jeep Grand Cherokee 2026 — technical service bulletin
Bulletin 112647 · NHTSA communication 11033906 · issued Jun 2, 2026
Technical service bulletin
communication type
Fuel/propulsion System
component
2026
model years
3
vehicle entries
Official summary
Fuel Fill All 2026 Jeep Grand Cherokee (WL) vehicles must be delivered to the customer with a full tank of premium gasoline (91 octane or greater) at initial delivery. The use of premium gasoline better supports engine performance during the break-in period (300 miles / 500 km). The reimbursement has been updated to reflect this premium gasoline allotment. Customers should refer to the vehicle Owner Manual for all ongoing fuel recommendations and requirements.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.