Aftermarket fuel additives

INFINITI does not recommend the use of any aftermarket fuel additives (Example: fuel injector cleaner, octane booster, intake valve deposit removers, etc.) which are sold commercially. Many of these additives intended for gum, varnish or deposit removal may contain active solvent or similar ingredients that can be harmful to the fuel system and engine.
See also:
2008 Infiniti M35 Review
A car that's two years into its current design is usually beginning to show
its age, especially when it has as many serious competitors as Infiniti's M
sedan does. The M outpaces that trend: The 2 ...
Capacities and recommended fuel/lubricants
The following are approximate capacities. The actual refill capacities may
be slightly different. When refilling, follow the procedure described in the
“Maintenance and do-it-yourself” section to ...
Command List
...
