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.
A rank of O-5, or lieutenant colonel, begins with $59,656 per year at two years or less, goes to $75,636 per year after six years, and maxxes out at $101,354 after 22 years. The highest rank of general of the Air Force is available only after 20 years at $187,765 per year. The maximum annual wage is $230,879 after 38 years. As part of their compensation, Air Force members receive several benefits.