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#1 (permalink) Old 04-21-2010, 05:32 AM
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kiaguyTT here.

I'm wondering what is the best type of gas/petrol o use in my 2004 CERATO????

Before purchasing my car, I did some investigating and I was told by someone at our local KIA dealership that ONLY PREMIUM UNLEADED should be used in this car. They also went further to mention that if I were to use REGULAR gas/petrol, it could wreck my engine.

The funny thing is though, last Saturday while at the gas pump, I accidentally put REGULAR instead of PREMIUM and to be honest, my car actually performed a bit "peppier" that usual. Go figure right???

So folks, what is the actual fuel type recommended for my car.Oh, i should also mention that my engine is the 1.6 version.

Thanks,
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#2 (permalink) Old 04-21-2010, 08:07 AM
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Here in the USA the only requirement is to use gas with an octane rating of 87 (regular gas). I don't know what the gas octane rating system is in Trinidad but the equivalent rating should be OK.. Premium gas is probably a big waste of money for you car. If the engine doesn't knock and runs OK run "regular" but be sure to buy it from a known quality gas dealer. (no off brands as they may have dirt or water mixed in or even worse... lower octane ratings or added "fillers" to boost their profits).
My 2006 2.0 Spectra runs great on regular and the owner's manual states 87 octane.

Enjoy your Spectra BUT remember to REPLACE the cam belt EVERY 60k miles (96.6km) or buy a NEW ENGINE! If the belt breaks you have MAJOR problems!
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#3 (permalink) Old 04-25-2010, 09:56 AM
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Have a USA Spec 2003 Spectra LS 1.8L Auto. Owners manual tells us to use yes "87RM". But if you read it close it said "87RM MINIMUM USE". On the GAS door it tells us "Regular Gas only reguired". This is all I know very confusing to many unless you really know what they are telling you. Here in the USA gas is like this below. Some pumps (names they use) do not help it out but this is the real deal. So what you really should be useing is "89RM". This is what I use and runs great!

86RM Grade (beer pee) gas, but still in SOME pumps in NM, USA and elsewhere USA. NOT WIDE SPREAD. For Lawnmower use really.

87RM Economy Grade. MINIMUM grade you CAN (not RM86) use for short periods if you have to, without doing damage by your book. It is not the NORMAL day in and day out grade you should use. Dave you can still do as you like. But I think you have just been lucky and not had major issues as of yet. The 1.6 and 1.8 and 2.0 are strong and rugged workhorse engs. Takes allot to trash one. I got 54,180 on OEM plugs. And they were not bad, just electrodes were worn down but not fouled or any sign of crazy deposits when checked. One coil was weak and had slight misfire was why we were in there. SO we replaced them since in the 1.8 they are NOT platinums.

89RM Regular (mid) Grade.

91-94RM Super/Premium Grade.

For all intents and purposes we HAVE ONLY a Three TIER gas grade system here. 87/89/91-94. When you understand that, then you understand what they are really telling you.

Last edited by 04SorentoLX; 04-25-2010 at 04:39 PM.
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#4 (permalink) Old 04-25-2010, 03:52 PM
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It depends on how low octane your local regular fuel is in Trinidad., I know from the forums that 2L Spectras/ Ceratos run fine on US 87 octane regular. In Australia our regular unleaded is 91 octane so no problems with that. All later 2005+ 1.6L RIOs with the same engine as your car run fine on 87 so it shouldn't be a problem for you to do the same. Check and see what octane the regular is where you live if it is 87 or above it will be fine to use. Actually the owners manual if you have it, would state the lowest recommended octane the engine requires.

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#5 (permalink) Old 04-25-2010, 05:07 PM
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Quote:
Originally Posted by pulsar86 View Post
It depends on how low octane your local regular fuel is in Trinidad., I know from the forums that 2L Spectras/ Ceratos run fine on US 87 octane regular. In Australia our regular unleaded is 91 octane so no problems with that. All later 2005+ 1.6L RIOs with the same engine as your car run fine on 87 so it shouldn't be a problem for you to do the same. Check and see what octane the regular is where you live if it is 87 or above it will be fine to use. Actually the owners manual if you have it, would state the lowest recommended octane the engine requires.
Again the dicotamy of "Requires" and "Recommends". As I addressed above. But you are telling the truth as it is written in books. Just not always are they writting it clearly nor consistantly, and not confusingly. It leaves allot up to interpetation really.

A Diesel "Requires" Low Sulpher DIESEL, That is all, to not damage it. But will run on KEROSENE or BIOFUEL better. And in dead of winter in some areas it "RECOMMENDS" winterized Diesel. But all it "Requires" is Diesel. If you get it to start and run on the Jello/waxy stuff so much the good. Gas is the same Idea with 87/89. Damage comes in many forms. Waxy Jello in diesel is right in your face and there to see fast as it clogs injection pumps and injectors and lines. Gas takes a more evil and back room approach to damage. It is long term and not seen fast. But it is still there. Plugs/Rings/Valves/ MPG over time/Lost power form peak output of new. It is not uncommon to see a 3-5 year old car and 35,000-50,000 with a when new @205HP 199TQ eng have @187-190HP 182TQ. Does 87RM (required) and a retarded ENG MAP do this. Or a 89RM (recommended) and not retarded ENG MAP do this? You know I am not picking on YOU pulsar86.

Our 2003 USA Spec Spectra LS 1.8L runs great on 89RM and not so on 87RM. It runs ok if you like that sorta thing thou. RM91-93 is a waste too. No better at all.
My 2004 USA Spec Sorento LX 3.5 runs terrible on RM87 (required in book) and great on RM89 (recommended) and marginally better on RM91-93. SO it is not worth the $ over RM89.

Last edited by 04SorentoLX; 04-25-2010 at 05:22 PM.
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