regular, mid-grade or premium gas. what do you use on your LT1???
10-06-2003, 07:23 PM
#17
Registered User
Join Date: Apr 2003
Location: PA
Posts: 1,591
yes and no, thats why they have knock sensors. Predetonation will straing the bottem end, piston rods, everything. Predetonation will cause excessive cylinder pressure before TDC which is what causes the extra strain on everything. But after you get predet the pcm pulls timing. I don't think there is any real way to check for the extra strain the engine has endured.
anyone else have any comments on the above?
anyone else have any comments on the above?
10-06-2003, 08:00 PM
#19
Registered User
Join Date: Oct 2002
Location: Cincinnati, OH
Posts: 543
i do a mixture usually...depends...i used to put 93 in it...and got some gas mileage readings.....then i used some 89....got some gas mileage readings....then used some 87 and got some readings....all the same driving...and all within 1 mpg of each other...there really isn't a difference i don't think...so i've been running 87, 89, or 93 for the past 15K miles and no problems...fas mileage stays the same with each fill up and power is the same...no one is gonna feel 1-2 rwhp....if you are goin to the track...fill up with 93 or sunoco 94 or somethin....JMHO
my dad told me that he sat down with a buddy of his who runs a few stations or somethin or is a manager for a bunch of them...i dunno..but he said its all advertisement, there is not difference...he even told us not to waste the money on the "higher octane"
my dad told me that he sat down with a buddy of his who runs a few stations or somethin or is a manager for a bunch of them...i dunno..but he said its all advertisement, there is not difference...he even told us not to waste the money on the "higher octane"
10-06-2003, 08:45 PM
#23
Registered User
Join Date: Jul 2002
Location: baycity, mi
Posts: 1,652
nothin but the good stuff!!! 94 sunoco, i once put low octane in my car and it realy didnt like it, it had alot of hesitation.
and i dont know if any one mentioned this but the higher the octane the longer the fuel burns in the cylinder
and i dont know if any one mentioned this but the higher the octane the longer the fuel burns in the cylinder
10-06-2003, 08:50 PM
#25
Registered User
Join Date: Aug 2003
Location: North of Boston, MA
Posts: 607
i use 89 octane. i want 93 but since my parents r payin for my gas i dont wana make them pay too much. i found a gas station that sells 93 for the price of 89 at mobil in my town, but id have to pay cash instead of usin mobil card.. mby sum day ill just say screw it and start pumpin 93 from mobil. 
10-06-2003, 08:58 PM
#28
Registered User
Join Date: Mar 2003
Location: The Great State of Texas.
Posts: 465
Originally posted by ThotYouKnew
ha you guys are all cracked out...its all in the head...ha the gas station plays mind tricks on you...lures you in...ha peace happy pumpin
ha you guys are all cracked out...its all in the head...ha the gas station plays mind tricks on you...lures you in...ha peace happy pumpin
Do this.
Dyno with 93 octane, empty tank, then fill with 87 and redyno...Our comps have "low octane compensation" tables for a reason...Pulls timing, causes KR...
Plus, random inspections by the state help, too.
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