The 2.5 is tuned for 87, 89 is a waste of money and 91 or higher you should only need if you have lots of bolt ons and have had the car tuned for 91 or higher to get the most out of the tune. Also the stillen qr-pro requires the use of 91 octane. But just I/H/E 87 octane is just fine.
from experience: tank of 87, no noticeable power; tank of 89, power is definitely present.
ive got no performance mods, just a short shirter and a berk WAI. all my mods are sound system related. im guessin i should just stick to the 87. i filled 89 and i thought i was noticing more power but maybe i was just imagining it
89 octane here, all stock tho. 10% Ethanol is a lot cheaper in a corn state , I save 10-15 cents per gallon this way, plus I live about 5 minutes from my work which I do full time for 3 days a week , I fill up about once a month
It doesn't matter. The higher octane you use, the cleaner it burns thus resulting in better combustion aka minor power gains. Using a higher octane also keeps a lot of the sensors cleaner as well as the cat.
Just dont go pouring C-16 into your tank. Bad things happen to dumb people when that occurs.
93 Shell here. It gets HOT here in Texas and my car is always running all day everyday on the many freeways we have here. I switched from 87 and noticed a difference. The engine runs smoother and has more get up from take-off.
Actually the manual IIRC states 87 at the least, it doesn't say you should get 87 exactly. 89 is still not a waste of money since it's cheaper than 87. Premium is the only gas grade that's a waste.
My snail eats rice
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