I am always driving in the drive gear with the circle around it..I hope that is correct but there is also a normal driving gear!!

what is the difference betweent he two and am I suppose to switch between them? if so when?

thanks

Jr is bang on. Use OD to maximize you fuel effiency on generally level and long stretches of road (ie highways and freeways). It allows the engine to rev lower above 50 mph (85-100kph). In OD at 50mph you should be revving around 1800 to 2100 rpms. If you are in drive, your engine and trans will rev a lot higher thereby using more fuel.

I use drive for in the city and if I want more ballsy acceleration.

Up to you

I'll have to agree with everyone.. OD is fine and is best for fuel economy. The only time I shift out into D is on highway when I want to pass some Dumb *** with authority.. thus forcing it to downshift.. but you don't need to do that since if you run into hesitation or want to pass someone with some oomph.. simply let off the pedal and stomp back down on the pedal.. this will kick it out of OD ( TCC lock ) anyways if you dont' want to keep shifting on the shifter. But other then that.. I"m usually on OD unless on incline and going slow enough to warrent it ( rpm under 1700 rpm.. personal preference )