5.7 Hemi’s reccommend it. The one in my Jeep will retard the timing a little if you put 87 in it so it won’t knock but you will give up some power and mpg’s so you may as well just use the 89. And yes, I can tell the difference.
5.7 Hemi’s reccommend it. The one in my Jeep will retard the timing a little if you put 87 in it so it won’t knock but you will give up some power and mpg’s so you may as well just use the 89. And yes, I can tell the difference.
Fiat 500 Hellcat. I like it.