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Joined: Mar 2015
Posts: 2
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Joined: Mar 2015
Posts: 2
Does it make a big difference? Should I be worried?

Joined: May 2002
Posts: 806
Likes: 15
CelicaSpecialist
2008 Scion tC
CelicaSpecialist
2008 Scion tC
Joined: May 2002
Posts: 806
Likes: 15
The recommended GTS spark plugs are one heat-range colder than the recommended GT spark plugs.

Colder heat-range plugs help stop pre-ignition, and are generally used in highly tuned normally aspirated and forced induction engines. For a example, the GT plug heat-range is 16, whereas the GTS heat-range is 20, 1 heat-range colder.

For a standard internals road car there is probably not much advantage to go for a colder plug, unless you drive you car in the 7-8000RPM range for extended periods.

Though, for the Celica GTS, it is recommend to use a these colder plugs because of its VVTL-I tech. A downside of cold plugs is that they foul easier than hot plugs.

Since you've put GT recommended plugs in to your GTS, the plugs you are using are 1 heat range warmer. Its recommended to keep your Celica out of high-rev ranges for extended periods -- especially on your GTS.

Joined: Mar 2015
Posts: 2
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Joined: Mar 2015
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Thanks so much man you really took a lot off my mind. Another thing though, do you think that that one heat range difference will make a noticeable mpg gain/loss?

Joined: Dec 2013
Posts: 16
Member
2000 Toyota Celica GT
Member
2000 Toyota Celica GT
Joined: Dec 2013
Posts: 16
I'm not good with the spark plug topic, But use what it recommended, I suggest you just replace it again with the right spark plug for your model.

Using wrong spark plug or dirty can cause high fuel consemption and lack of power.

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cRodz
cRodz
00 Toyota Celica GTS
FT Lauderdale & UF In Gainesville

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Joined: October 2003
Thank you.: 2 All the ecelica members that have helped me out with my questions
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