Posted by Milo in Pa [108.162.237.115] on Thursday, September 14, 2017 at 08:27:52 :
In Reply to: OT, but flathead Octane posted by Gary in CO [162.158.69.162] on Wednesday, September 13, 2017 at 20:31:08 :
I tried mid grade in my 251 and it runs cleaner out the exhaust so now I use it all the time.