Gas Mileage ?
#11
11-07-2009, 01:24 PM
Not quite. The octane rating rates the gas's ability to resist detonation. 87 is just as flammible as 89 and 93, but it takes more heat and compression to ignite it. When you are running a higher compression or advanced timed engine, you don't want the gas to pre-ignite, so you have to run higher octane gas to prevent it from pre-igniting. Now on an engine designed to run 93 octane, the gas will burn hotter and faster, producing more power, but that is because it is compressed more, not because it is any more flammible.
That carbon build up you're referring to, that is caused because on an engine that is set up to run on regular gas, high octance gas burns slower and at a lower flash temperature. This causes it not to burn as clean and the leftover residue is the carbon buildup.
That carbon build up you're referring to, that is caused because on an engine that is set up to run on regular gas, high octance gas burns slower and at a lower flash temperature. This causes it not to burn as clean and the leftover residue is the carbon buildup.
Last edited by 95_318SLT; 11-07-2009 at 04:38 PM.
#12
11-07-2009, 04:10 PM
Hall Of Fame
Not quite. The octane rating rates the gas's ability to resist detonation. 87 is just as flammible as 89, but it takes more heat and compression to ignite it. When you are running a higher compression or advanced timed engine, you don't want the gas to pre-ignite, so you have to run higher octane gas to prevent it from pre-igniting. Now on an engine designed to run 93 octane, the gas will burn hotter and faster, but that is because it is compressed more, not because it is any more flammible.
That carbon build up you're referring to, that is caused because on an engine that is set up to run on regular gas, high octance gas burns slower and at a lower flash temperature. This causes it not to burn as clean and the leftover residue is the carbon buildup.
That carbon build up you're referring to, that is caused because on an engine that is set up to run on regular gas, high octance gas burns slower and at a lower flash temperature. This causes it not to burn as clean and the leftover residue is the carbon buildup.
#14
11-09-2009, 01:36 PM
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#15
11-09-2009, 04:37 PM
You start by pulling off the accessory bracket. Then drain the antifreeze and remove the intake manifold. Remove the plenum pan from the intake manifold, replace the gasket and reassemble. If you get the felpro intake manifold gasket kit, it comes with the plenum gasket and manifold to head gaskets and manifold to block gaskets.
I would suggest that you download the '95 or '96 FSM from FAQ2 because the torque specs on the bolts are VERY specific and you have to step them up in a particular order.
I would suggest that you download the '95 or '96 FSM from FAQ2 because the torque specs on the bolts are VERY specific and you have to step them up in a particular order.
#16
11-09-2009, 04:51 PM
Record Breaker
#19
12-19-2009, 02:20 AM
City milage is very hard to predict when it comes to "normal." Stop and go kills the gas milage on anything. If you want to know if you're getting "normal" gas milage, you should test it on a highway trip.
My truck is a... well everyone here knows what my truck is (if not look in the top right corner)... and I average anywhere from 15.5 to 16.5 mixed and 18.5 all highway. I never do all city.
My truck is a... well everyone here knows what my truck is (if not look in the top right corner)... and I average anywhere from 15.5 to 16.5 mixed and 18.5 all highway. I never do all city.
