I'm averaging around 25-29 mpg depending on how I drive... I installed the RRM SRI, and didn't see a gratifying gain in fuel economy, but it sounds great and has more pop off the line. My last car got better mileage, but I wouldn't give up the RA's spunk & handling for the added economy! If only Mitz would have offered the RA with a 6 speed. Errr!

 

After reading all that I'm gonna hve to agree with you also. Seems to me that you lose a lot more than you gain from using a higher rated gas than what the manufacturer states to use. In fact, the only gain I've seen anyone say you get is better pull during accelleration. On the other end, it's bad for your engine, you decrease gas milage, and you are paying more per gallon. Add up those loses and you have a lot of money uselessly wasted. All so you can say that you beat some young punk at a light, that doesn't know or even give a sh*t about taking care of his car.

With gas prices being as high as they are lately why would you want to spend more when you don't need to. Think with the big head and not the little one.

 

No, a car does not advance/retard its timing based on the fuel's octane. It advance's the timing when the engine is under acceleration or at high revs. It retards it at idle or closed throttle. The ONLY thing a high octane gas does is resist detonation. Gasoline has a point at which it will ignite under a certain amount of pressure. The RA's compression ratio simply IS NOT high enough for this to happen to regular fuel. That is why all these RSX-s cars and other high compression cars or turbo'ed cars need premium, they have A LOT of fuel and air getting really packed in there, regular fuel cannot remain stable and ignites from the pressure, before the spark plug ignites it. It is that simple, variable valve timing, ignition timing etc makes no difference. Forced induction and high compression is what calls for premium.

 

I fill up with Shell or Conoco 83 octane and I usually get right around 350-360 miles per tank and I've never had worse than 30 mpg, usually around 32.5 mpg. I drive to and from work every day (52 miles) so of it 40 mph, 70 mph, and 80 mph.

 

Wrong. High-compression or forced induction cars have had this feature for years. It's a method of protecting the engine in case the owner doesn't put premium gas in it. THIS car may not have that feature, being designed for low-octane fuel, but that doesn't mean that NO car has that ability.
You've got that exactly backwards. It retards the timing under hard acceleration, and advances it at idle/part throttle.
Partly right. It does resist detonation, but it also burns slightly slower, together allowing you to advance your ignition timing a few degrees, and possibly eke a couple more hp out of it, without changing compression or TC/SCing it.

 

I hope that's a typo. 83 octane? Even the cheapest stuff they sell here is 87.

 

How do you manage to get this number , I drove today to work and back 150 miles and I use half of tank. never went over 75 MPH had most of the trip on cruse on 70 MPH

 

yeah i know right... if i get more than 160 till my meter reads half its a miracle

 

Well guys, I filled up a few days ago and on this tank I've made it a point to stay under 3500 rpm. I'm at a 1/2 tank and 160 miles. This is a good 30 or 40 miles more than what I would usually have at a 1/2 tank. I'll let you guys know the final numbers when I fill up in a few days. I might have just gone from 22-24 mpg to the 27-29 mpg range. I have no clue how that one guy says hes getting 32 mpg. He's gotta be fudgin numbers.

 

I live in Central Utah, and I doubled checked it's 85 octane, the highest octane we have is 91.

And to address the fudging numbers...why would I do that...duh. I fill up every 7 days, 350-360 miles per tank, usually about 11 gallons of gas = roughly 32.5 mph (my best mph was 35.8 mpg).

 

if you fill up a full tank of gas how many days will it last? i filled my gas tank friday night and later today going to fill it up again; four day man, my eclipse lasted 7 days to fill up.

 

Ok here we go again, I filled up today I had 269.8 milles went light came on and I dump 10.8 gallos to full tank, it came out to 24.98 MPH lest call this 25 and the worst is I had to drive like my granma to get this F..... miles this is not good................if I drove like my granma to get 25 MPG how do I have to drive to get like some claim 32 MPG???????????????

SOMETHING SMELLS FISHI

 

I have an auto and probably will never see 260 before my light comes on. I am really trying this time to drive like an old lady (trying not to go over 3000 rpm). I live in the city with lots of lights so it's tuff since these cars loves high RPMs.

 

man.....i am in Los Angeles, and i Barely get 20 mpg.......i've been trying to shift below 3k and i still get that kinda mpg......oh wells.......and plus the gas is getting higher now

 

I get about 280 out of a tank. Combined city / highway driving.