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Old 08-21-2003, 05:07 PM   #1
SEVEN
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Default More Pep!

I recently decided to use premium fuel, before that I only used regular. Well, I instantly realized that the BAJA was running with a lot more spunk.
I recently read that the first 2.5 was made to run on premium fuel,I would guess they did something that would allow the ingine to run on regular. but for me premium really makes a noticeable, better difference.
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Old 08-21-2003, 06:00 PM   #2
Peloquin
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Regatta Red/Silver Stone

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I always split the difference and go with the midgrade.
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Old 08-21-2003, 06:02 PM   #3
jimqpublic
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If the compression ratio here for the EJ25 is the same as in Australia, it's 10:1. That high a ratio seems to me to need premium.

If that's the case, using lower octane results in retarded ignition, and less power.
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Old 08-22-2003, 08:03 AM   #4
Baha95
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I've had my Baja for about 6 weeks now, and always used premium fuel, partly due to discussions that it was "underpowered". It's had plenty of pep (for me anyway). good acceleration for entering highways, etc. So, I do agree that if you're not using premium fuel, give it a try!
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Old 08-22-2003, 11:57 AM   #5
bossies2
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Default gas myths

Hello all,
I hate to see people give extra money to the gas companies, so check out this link...http://www.faqs.org/faqs/autos/gasoline-faq/part3/ It explains in section 6.13 about octane. Happy motoring!
Dave
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Old 08-22-2003, 04:38 PM   #6
Peloquin
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So how do you know what your optimum Octane rating is?
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Old 08-22-2003, 04:53 PM   #7
bossies2
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The lowest octane number that doesn't knock.
Dave
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Old 08-22-2003, 07:11 PM   #8
SEVEN
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Read the article on octain 6.13. interesting information there.
However for me, the BAJA went from kind of lathargic on regular unleaded, to peppy as soon as I used premium.
WHY?
ps(no drugs or drinking involved)
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Old 08-23-2003, 01:51 AM   #9
Postalshark
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If the Baja has a knock sensor then it will "adjust" to whatever fuel is being used at the time.

I have only had my Baja for a week, so I haven't dug too deep into the various sensors installed from the factory.

I can say that with my 1991 Mazda Miata that I installed a Flyin' Miata turbo system in DOES adjust to whatever I put in the tank.

If I put 87 octane it will run and NOT give an audible knock, but it certainly runs ALOT slower that when I put in 94 octane.

I can't say what the "optimum" octane rating for a Baja is, but this MAY explain why some feel more power with higher octane.
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