this might be a dumb question, but who cares. I have a 94 dohc vtec del sol and it says unleaded fuel only. My brother's prelude and integra gsr are basically the same engines(dohc vtec), and for them it says premium only. Do i have to use unleaded or is premium the one to go with. All dohc vtec sol's say unleaded fuel only which strikes a sense of aw to me.

 

use premium in all vtec dohc engines (or just "the lowest you can without pinging")
And all gas is unleaded these days anyway

 

the DOHC's reccomend 91 octane or better.

the SOHC's recommend 87 or better.