Octane test?

[PCGUY112887]

Is there any simple way to test what octane a gas is?

At my fav gas station I have realized they have counters on the sides in tiny numbers that count how many gallons have been pumped through that pump. There are 2 banks of numbers, however 3 grades of gas. 87, 91, 93.

If I pump 87, set 1 of numbers moves to the gallon (counter is over 350k gallons!).

If I pump 93, set 2 moves (only 16k gallons).

I have yet to test 91 so I dunno which bank it's going to move.

Is there any way I can test the octane coming out of this machine aside from sending it to a lab?

[gectek]

nope, lab test only...if you look on the pump iyll show u the formula they use, but normal peeps done have the equip to count the ratio of octane to heptane and a lead additive...srry just have to trust the pump

there is a good article of it in chevy high perf feb 07 issue

[firechiken]

Pump the 91, and both move

[PCGUY112887]

Pump the 91, and both move

Humm never thought about it... think it could just mix the 2 together?

[firechiken]

yep, that's what happens

[Rhedalert]

x2 on both moving