ive heard that if you got a b16 you gotta fill it up with 91 gas, i barely got my car its a 92 eg and it has a usdm b16 ive filled it up once with 87, and i wanna clarify to make sure i can put 87 and i dont have to put 91.

 

It needs 91. Using gas with an octane rating too low for the engine will cause detonation and if this happens for a prolonged period of time it can result in serious engine damage. The reason you need 91 is due to the higher compression of the B16.

 

is it bad that ive filled it once with 87 ?

 

It'll be fine, don't worry about it. Just use 91+ in the future and you'll be good.

 

lol cheap ***. premium is the way to go haha. its not bad that you filled it up once with 87.. but its best to stay away from that cheap ****. i usually stick to plus but i dont got a b16 in my eg. but if i could afford 92 octane i would definately get it.. but right now i can run regular on my little d16z6 and it will run just fine but i still run plus. but back to the topic at hand doing it once isnt going to damage it that i know of.. its more of after some time kind of thing. but dude up there has it right higher compression on the b16

 

just an FYI, you're wasting your money on putting anything but 87 in your D16Z6, unless it's built with high compression, the timing is really advanced, or it is turbocharged. There is nothing wrong quality-wise with 87 octane gasoline. The only difference between 87 and 91/93 is that 87 has less resistance to detonation, which is a negligible difference on a stock compression/timing D16Z6.