our pump swill here is 85 octane, so I kept my 572 at 9.5 to one, that way I know that I can run any gas anywhere. Tim


1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!