No. It wouldn't benefit you at all. Since the 4.7 only has a 9.0 compression ration it can run on 87. Any extra octane is just a waste.

"The octane rating is a measure of the resistance of gasoline and other fuels to detonation (engine knocking) in spark-ignition internal combustion engines. High-performance engines typically have higher compression ratios and are therefore more prone to detonation, so they require higher octane fuel."

 

Awesome! I'll put that money aside to buy a programmer!

edit whoops, compression changed on the 2008's

"In 2007 (model year 2008), Chrysler replaced the 4.7 liter V8 with a new version. Power went from 230 hp to 290 hp (and up to 320 lb-feet of torque) with that move; gas mileage went up, and noise and vibration went down. The new 4.7-liter V-8 features 5.7-Hemi features such as two spark plugs per cylinder, with a high 9.8:1 compression ratio, and better port flow; but it has a new slant/squish combustion system design. "

Quoted from:
http://www.allpar.com/mopar/47.html

 

Well its actually 310 Horsepower and 330 torque for the new 4.7. 9.8 still only needs 87 octane. Heck the Hemi has 10.5 and it only need 89. Don't waste your money on premium gas, just buy 87 at a good gas station.

http://www.allpar.com/model/ram/2009-ram.html

http://www.trucktrend.com/features/t...ecs/index.html