Squeezing Every Last Drop of Gas Mileage

[rwnoutlaw]

I am about 33-35 running 68-70 on shell


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[tdiller]

mpg

I've had my 1.8 sonic now for about a month. I usually do a bout 500 miles a week. Mostly expressway and rural. My first tank of gas was not very good mileage wise. Since then I have been getting consistently better. My last fill up was 38 mpg. Over the number of fillups I have had I'm averaging 35.5 mpg. My secret? I don't really have any. I do the speed limit (55-65) and try not to put my foot too deep into the gas pedal. I try to keep my rpms below 2000. At 60mph I'm right at 2k rpm. I live in a fairly flat area so don't have to contend with a lot of uphill/downhill driving. I have noticed the cooler it is the better the gas mileage whihc makes me wonder if a cold air intake would be beneficial.

Alright, as we 1.8L owners know, we don't get the awesome mpg that the 1.4T gets. That being said, what I can do in order to get the BEST mpg?

Here's my driving:
I drive almost 2500 miles a month. I'd say at least 90% of that is highway. (60% is 65+ mph and 30% is ~55 mpg) The other <10% is stop and go, from 25 to 55 mph.

At the moment I am getting 29.5mpg, what can I do to ensure I am getting the absolute best mpg? What should my tire pressure me at? What gas should I use? What is the "sweet spot" for speed, when trying to get the best mileage?

I'm also open for modifications, but nothing crazy expensive. I'm trying to save a little money by getting better mileage, so I don't want to break the bank while trying to save it.

Any help is appreciated, thanks.

(Looks my Fuelly in my signature is different. My current mpg reported by my car is only the last 3 fill ups, while the Fuelly is lifetime.)

 

[inm]

Man, this thread is still active? Crazy, long time no see, guys!

Reading back through this thread is making me miss my Sonic a little. I'm only getting about 25 on premium in my Fozzy.

 

[MyLonewolf25]

Technically you can run up to like 60
Plenty of drifters do or higher

Basic aero mods as said

Running better fluids and oils will DEFINITELY help efficiency

I really recommend redline overall
But if you absolutely want the absolute best best look up the site motor oil evaluator

ALSO
Running e85 WILL get you better efficiency per $ but slightly less range per tank

It's efficiency loss is far outweighed by price difference ( and you'll get better power so it's easier to be in lower rpm! Win win!)

 

[Aftermath86]

I always seem to get the best mpg with migrate gas. I determined that 5 years ago and never looked back. Also, since I put in AMSOIL signature series my mpg has been floating around 42-45 mpg on a flat plane going 70.

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[SuperFudd]

50 at 50. 37 at 75.