And you know this because you are such a genius and drive my car on a daily basis right? Oh... No? My bad. I personally get better gas mileage (I calculate it every time I fill up) and the car runs much smoother than with regular....

 

Thank you,I am a Genius. Compared to your statements about a subject you have a limited knowledge about. With all your facts based on your 3.8 performance car. [sm=gears.gif]

 

i got a lt1 94 got it about 3 weeks now a low rpms it miss a bit exspecally when i use the cruise control i been useing the cheap gas should i use a higher octane and is there a way to tell what side of a headgasket has gone the car just bubbles over out the rad cap only when it get warmed up,i been useing 87 octane

 

your problem does not sound fuel related.

 

run 91, better for your engine, and u CAN feel the difference.

 

if you can, take ur car to the mechanic. something is wrong

 

why would there be any thing wrong wih the car you can take any car truck,and you can feel the diffrence from 87 to 92,thats why i run 92 in my 73.

 

a stock engine set up for lower grades of fuel will not benefit from higher grades than it needs. and really... only highly modified or high compression applications will have any noticable difference from changin fuels. 90% of all cars and trucks made will not produce a single hp w/ 92 over 87, because the tunes of most cars and trucks do not have enough timing to reach the limits of 87 octane

the way fuel octane works is your engine requires a minimum octane rating in order to operate at its peak. using the other logic, if u feel a difference between 87 and 92, then there is a difference between 92 and 99. But there isnt. some cars require premium, and if you go lower than that the engine will begin knocking and pulling timing. but it shouldnt pull much if you are running a regular production gasoline, so were talking only a couple degrees and on a stock car that is too little hp to feel.

its placebo effect. thats why i say if he is getting a noticable difference then he should get other things checked out. his car is potentially knocking way more than it should. maybe carbon deposits turning into hot spots.... i dont know.... but the issue isnt just higher octane giving a kick in the pants. that doesnt happen


the OP has an lt1 which is higher compression and has a little more radical tune, so high grade is preferred. I still dont know that you would actually feel it... with the ammount of tuning ive done with my car, i can flip between all sorts of tunes and the only way to really know if it made a difference is to strap it to the dyno. ur butt-dyno can really mislead you