Power numbers were made on 93 octane. From the manual:To get the full 252hp you need to use 91 octane, 87 octane will give you 242hp, either fuel will work in the car as it will adjust. But to get the most out of the vehicle you'll need to use premium.
Precisely. Just to do a quick calculation. Lets say your tank is 12 gallons, and you fill up once a week using 87 octane. For the year to buy 89 will be ~$74 more a year and 91/93 would be ~$124. If you gotta pinch pennies just don't buy another pair of pants and there is your extra money for premium gasJust use 91/93. Cost savings are negligible over 87 or 89 over the course of a year.
+ power!!
Would love to know myself. We keep some 108 laying 'round here. Would be fun to find out what a tank feels like...I wonder if the map will auto adjust to handle 100 octane. The stuff costs twice as much as regular but it's available here at a few places.
I know the knock sensor pulls timing for lower octanes, I don't think it advances it for higher octane.I wonder if the map will auto adjust to handle 100 octane. The stuff costs twice as much as regular but it's available here at a few places.
You would have a higher effective octane from running a light mix of e85/ regular unleaded 87.... 30/70 or so is about 110 octane w/ DI. You will be able to increase timing manually with a tune. The ECU will not do it for you.I wonder if the map will auto adjust to handle 100 octane. The stuff costs twice as much as regular but it's available here at a few places.
If there is a peak horsepower reduction from running lower octane fuel there MUST also be a torque reduction if peak horsepower is found at the same RPM, which I would imagine it is:Not to split hairs but I thought I read in the supplement that using non premium fuel would reduce HP to 243. The interesting part for me was that there was no change to torque. Also, I wonder if using non premium fuel affects the over boost in any way.
You should buy a civic or accord or something. Will be a better match for you.I'll be running 87 pretty much all the time. A 10hp loss and zero torque is pointless for the extra $.30-.50 per gallon that premium costs over it. I'll throw 93 in there if I'm going for a specific drive through the mountains really pushing it, but for 95% of my DD'ing it will just be a quick run from 1st to 3rd every now and then.
Very true. There are plenty of timing maps on an ECU for various circumstances...but all those circumstances timing is being pulled.I know the knock sensor pulls timing for lower octanes, I don't think it advances it for higher octane.
That's along the lines of what just crept in my mind. I'm thinking 87 during the snowy months, 93 on the weekends, and 87 during the weekday commute.I'll be running 87 pretty much all the time. A 10hp loss and zero torque is pointless for the extra $.30-.50 per gallon that premium costs over it. I'll throw 93 in there if I'm going for a specific drive through the mountains really pushing it, but for 95% of my DD'ing it will just be a quick run from 1st to 3rd every now and then.