95 neon SOHC. i am looking to purchase some auto rx soon. i have 74,400 miles now. i averae like 3,000 miles in 4 or 5 months, however, i go through rather considerable stop and go traffic, long idling, due ot everyday backed up traffic, WAQY too many stop signs, ect. i usualy change my oil every 3 months, becasue of contaminant buildup. would using rx with my next oil change, under sever driving, get me to go a good full 6 months. on dino? i am using moblie 1 right now, switchiong back to dino.