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GTS and octane ratings #188688 May 30, 12:06pm May 30, 12:06pm
Joined: Dec 2003
Posts: 487
Portland, Oregon
GTS2003BLK OP
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2003 Toyota Celica
GTS2003BLK OP
Senior Member
2003 Toyota Celica

Joined: Dec 2003
Posts: 487
Portland, Oregon
GTS and octane ratings
With 11:5:1 compression I'm guessing the 2ZZ engine is pretty sensitive to octane ratings.

Anybody ever used or mistakenly gotten lower than 92 octane in their GTS? How bad did it ping?

I think I know the answer to this already, but with gas prices being what they are I at least gotta make sure.

Re: GTS and octane ratings [Re: GTS2003BLK] #188689 May 30, 12:14pm May 30, 12:14pm
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stay low on rpms and you'll be fine wit the middle stuff but its still not great


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Re: GTS and octane ratings [Re: drkramm] #188690 May 30, 12:14pm May 30, 12:14pm
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it's not very good..
91 is what i used.


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Re: GTS and octane ratings [Re: VSGTS14] #188691 May 30, 12:21pm May 30, 12:21pm
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never tried anything lower than 91 and NOT going to

only 91 in mine.


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Re: GTS and octane ratings [Re: SquadOne] #188692 May 30, 1:49pm May 30, 1:49pm
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my gf borrowed my car last summer. . . and filled it up with 87, cause that is what she puts in her car .. . . well i just drove 300+ miles to burn the fuel. but i never really got on it, but this story is pointless. . opps.

everyone that i talk to tells me that you can put 87 in it, but why do somthing that book tells you specifically not to do


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Re: GTS and octane ratings [Re: Mp3Supply] #188693 May 30, 3:47pm May 30, 3:47pm
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Cali
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well i heard from a mechanic that graduated from UTI (technical institute); that 91 and up are for v6, v8's, and modded cars. as for COMPLETELY stock 4 bangers, 87 is fine.


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Re: GTS and octane ratings [Re: SquadOne] #188694 May 30, 6:15pm May 30, 6:15pm
Joined: Dec 2003
Posts: 487
Portland, Oregon
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2003 Toyota Celica
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Posts: 487
Portland, Oregon
As I understand it higher octane is meant to prevent pre-ignition form pressure and or heat, the higher the compression the higher the chance of pre-ignition. Some engine designs are more sensitive to this than others. I kinda figured the 2zz would fall in that class.

But, Counter Point, (Dan Ackroyd voice); "Jane, you ignorant slut..." ala local news consumer hotlines and the like comes reports of some vehicles running just fine on lower than listed octane ratings, so I had to bounce it off of the sounding board that is eCelica.com.

A feature of the GTS that is really making me feel good about my car buying decision right now is the Jekyll and Hyde relationship between gas mileage and high Performance.

The geniuses of this car is that the higher power is on tap at the higher RPM's but down in the low RPM's its gets a miserly 23/32, I must admit that It makes for a good feeling when I'm filling up next to an SUV. Celica has amongst the best gas mileage to Performance ratio of everything else in its class.

Thanks to all for the feedback.

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