Octane ratings are posted on fuel dispensers. CAUTION: Follow the fuel recommendations in your vehicle owner's manual. If your vehicle requires premium 91 or higher octane fuel, use a premium grade of gasoline. The least amount that's necessary to prevent detonation (spark knock). On most vehicles, that would be regular unleaded 87 octane gasoline.
The basic pay for any member of the U.S. military is based on two factors, rank and time of service. For an Air Force E-4, pay begins at $1,947 a month, or $23,364 a year, for those with less than two years of service.
Air Force personnel use the same pay tables as all members of the Armed Forces. The table for enlisted staff shows nine ranks, with pay differing every two years. The lowest rank of E-1, or airman basic, shows a maximum annual salary of $17,892 for 2012.