quick question about gas grade

[halcyon87]

I recently had my 96 i30 repaired with maf sensor, knock sensor and oxygen sensor. i been filling up with premium since then, so i was wondering if it is safe to use a lower grade gas?, because premium is putting a dent in my wallet.

[carmo]

lower octane is fine. the knock sensor will detect pre-ignition and the computer will retard the ignition timing. car run slower but wallet feel heavier.

[MinisterofDOOM]

Yep, as long as your knock sensors are in working order, the car will adjust for lower grade gas.

[halcyon87]

okay that's good to hear, and thanks for all your help, but will it cause any damage or wear on the knock sensor if i started to fill it with a lower octane fuel?

[trent.davis23]

If you cant afford an extra 20$ a month for gas then you shouldn't be driving. Yes the knock sensors work but they're not meant to be used as a crutch. At the very least you need to be using midgrade