Originally Posted by pulsar86
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.