93 octane [Archive] - SaabCentral Forums

: 93 octane

18th August 2009, 10:49 AM
does prolonged use cause any harm in a 1986 900s 16v NA?

Saab named Jag
18th August 2009, 01:25 PM
No it won't hurt anything but you are wasting your money for anything over about 89 octane for an N/A. With my old N/A 89octane was really the sweet spot for gas mileage and power. If you go above that then you are losing both (and money). That is unless your car knocks on lower grades in which case buy the higher stuff.;)