Does it hurt the engine or any sensors to run unleaded race fuel? I have found a place that sells Sunco GT 104 and the pump gas here is 91 octane.

I have heard mixing the two at 30% of the GT and 70% of the 91
would be 94.9.

I don't want to screw something up by running the race fuel.

Thanks

------------------
Vern

99.5 Lightning (black)
Alpine CDA-7941
Diamond Audio M551
MTX Thunderforms
RF 600a4
Borla Cat-Back
PSP Air Filter on order
Bassani Cat Pipe in the mail



[This message has been edited by 2fast4u (edited 01-15-2000).]

 

2fast,

no the 104 octain dow not hutrt the truck, it might the O2 sencors buit not the truck. In fast teh truck like the 104 ocatain better, makes more power and no detination on the top end (good for the track and useing NOS)

 

Im not trying to make fun but i almost fell off my seat when i saw that spelling.LOL LOL that is great! i am always looking at my keyboard and if you think yours is bad , you should see some of mine

 

LOL, i fell out of my seat too!!!!! Keep practicing

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1997 F150 Lariat supercab; two 12 inch mtx 7000 subs and 700 what amp; cherrybombs and alot of chicks...lol
Goal in life: is to own a Lightning

 

Hey guys, Sal here. Actual "race" gas will damage the O2s. That includes gas like Cam2, VP, etc. High octane fuel like Sunoco 104 is fine. It's actually the best you can use on a street driven vehicle. You can use octane "boosters" as well. They will turn your O2s colors, but they don't damage them. Race gas will damage the sensors. It takes about a full tankfull of race gas to effect them. What happens is it will cause the sensors to read "slow". That will affect the way it drives on the street. Since the O2s are not used during WOT, race performance won't be affected, but non-WOT drving will. Hope this helps.

------------------
SAL
13.35@103mph
All stock with PSP 99 Lightning Chip and Filter Kit

Power Surge Performance--- Your SOURCE for SVT Lightning EFI Tuning and Performance!! http://members.aol.com/NLOCsvt/svt.html

 

As long as the gas is an unleaded you will be fine. If you use a leaded race gas the o2 sensor will go like sal stated

 

Yes I know my spelling is off sometimes, but i have gotten to the point of typeing where i type so fast i misse letters or i hot 2 letters at once, also deos not help that i dont type the "propor way". anyways just hang in there with my typen

 

Dont worry about it ! i just had to comment it was so funny!Mine is worse believe me.I dont type the "proper way" either. Im not writing to the president , just having fun.Its better than ThIs WaY> Just kidding locox!!! I dont mind at a bit.I think it is funny how little things seem to bother some people so much>I am a jokester too! Pretty soon they will be saying i smile too much

[This message has been edited by BADASSSVT (edited 01-16-2000).]

 

Well..... just alittle bit )

[This message has been edited by Lightning Boy (edited 01-16-2000).]

 

Hey Sal:

I've burned many gallons of VP, C12/C14 also Avgas in past vehicles that I still have and I'm not getting any "Check Engine" light or my fuel economy has not changed. No "funny" driving around town. So what gives? Am I just lucky?

I've always heard that leaded fuel will foul O2 sensors and converters, but my stuff always runs just fine after drums of the stuff. Is there a test I can do to check the range on the O2 sensors?

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JIGAWATT SVT#2698
N.L.O.C. Member
4:10's
Bassani kit
TransGo shift kit
AIM 2 inch drop shackle

 

It only takes about two gallons of leaded gas to fry a modern catalytic converter. Plus, that white lead residue coats the surface of the O2 sensor's wires and changes their resistance so they don't read correctly any more either.

I change my O2 sensor every 10,000 miles when I'm racing because of the lead contamination. It has made up to a 2 mpg difference.

Later!
Jeff S.
http://nloc.org