Ray 
2005 Toyota 4Runner SUV Sport Edition Rwd 4dr SUV (4.0L 6cyl 5A)
2005 SE 33000 miles of experience
 I have been extremely happy with the V-8's performance capability.  I get about 21 MPG overall per the onboard computer using regular.  However, I have seen a slight drop since ethanol has been added to the local gasoline mixture.  The only problem I have had was the dealer did not lower the spare tire's pressure to match the 32 lbs in the wheels on the ground. It took a while to figure this out.