hello, i have a 1995 240sx se with about 85k and i i bought it about 5 months ago. when i first got it, the pinging was slight, now its getting louder!! and i have only been using 91 octane here in the bay area cali from either 76 or arco or chevron!! what could be the problem??
also, should i try octane booster?? and if so which one??
thanks!!
