As the title says, 501 on one tank of gas, I do about 90% freeway driving, however most of that is durring So. Cal. rush hour. The down side..... I needed 19.6 gallons to fill up. That works out to about 25.5 mpg. Not too shabby. It also set me back about $43 at the pump. I was driving on 87 octane for those that care.

 

Outstanding mileage but ACK!! on the octane. What made you decide to run the 87 and could you feel/hear a difference in your motor?

 

I have a 2004 auto sedan non sport suspension. I have tried 87 octane but find the car runs slightly better and gets maybe 1 - 2 MPG better with the 89 octane. I don't find that premium makes any difference in performance or mileage. However, I usually average 18.5 -21.5 MPG doing 2/3 hwy and 1/3 city. I95 can be stop and go but I always thought I would get better mileage, closer to maybe 24 or 25. Oh well, time for a diesel.

 

501 on 1 tank?????? HOW THE HE!! is that possible!!! You must baby that bad boy. As far as octane goes, I always found that throwing the Super in my cars (no matter what they were) I always got better gas mileage. The additional cost per tank basically evens out and if I can get an additional day of not hitting the gas station, all the better!

501 is impressive!! Do you drive in manual mode and short shift it?

 

WOW! How in the heck did you get 501? I'm lucky if I get 300-350 with 91 oct.

 

How did you get mileage close to the EPA's estimated MPG of 26 !? I didn't think it was even possible. I drive 80% highway and only get 21-22 MPG. Any tips would be appreciated!! Is it a coupe or sedan?

 

whoa....19.6 gallons......you a coupe?
the most i've been able to fill up was 18.1 for my sedan.......and also thought the capacity is 18gals.......anyone gone with more than 18.1 w/a sedan?

 

I just recently drove from SoCal to Central Texas (1500 miles) and I averaged 27mpg according to my Nav. I was following a moving truck that was speed linited to 65, so cruise control was set. And that's with a Vortech SC!

 

I cruised home at 65-70 mph on the freeway for 20 miles, this is at uneven altitudes, a lot of big hills, I got 24.5 mpg according to the Nav.

 

I routinely get 23-24 mpg for the daily commute. On my trip up to Laguna Seca ... we cruised at an average of 70-75 mph and I got 26.x mpg. The entire day at Laguna Seca it was 8.x mpg, however

The above figures were reported by the NAV ... which I find to be optimistic by 1 mpg in nearly all cases (vs. manually calculation). YMVV.

I've hit just over 400 miles to a tank, could of kept going for a bit longer but the thought of running dry or worse ... over heating the fuel pump ... I pulled up to the nearest gas station. But Gosh ... 500 miles and 19.1 gl. fill up. WOW! Good to know.


btw ... klg, our tanks are ~20 gallons large. They are also identical for sedans, coupes and Zs.

 

Man I would've been squeezing *** big time. You almost ran out of gas there my friend.

Tempting fate or just didn't feel like filling up gas for the last 150 miles?

 

Hey Randys_G....I think you must have been close enough to the truck to be "drafting" off of him.......no?

 

this isnt fair, i get 300-320 to a tank if i'm luck on 89 octane

 

thanks Clint, now i know i can go approx another 30-40 miles without sweating it, not making that a habit of course...!

 

Hey Kim, no problem. I woudn't recommend shoot for for 500+ miles your next tank, however. I generally fill-up at around the 350 miles mark, which is already well into the 'warning light'.