i recently bought a 97 Rav4.  i really like it (and it does great on
moderate off-roading).  the owner's manual says to use gas with an
octane rating of 87.  in the town i live in, though, regular is 86 and
plus is 88.  considering that regular here is now $2.06 a gallon (plus
thus being $2.16) i was wondering if it's fine to put 86 octane in.  i
believe the guy who i bought it from just used regular and the engine
is in great condition and i seem to be getting about 26 mpg.  103k
miles, 4wd, manual.

any and all real knowledge and wisdom is greatly appreciated.

thanks!