Anyone here use Rislone in place of 1 quart of oil? I was just wondering if it really helps or not. I end up doing an oil change about every 3 weeks (I do about 1k miles/week), and a couple mechanics have reccommended that I use the stuff every other change or so... Wondered if that was BS or not... 'sposed to keep the engine clean or something... I'm hoping something will help, as when I got it, I could get 300-350miles to the tank (13Gal) and now i'm lucky to get 200-240.....
