What is your mpg? How do you measure it? How do you drive you car? Mods?

Mine is almost 100% stock. Have a set of 18 inch wheels, that's about it. I struggle to get 20 mpg. I fill it up, reset the trip counter and when I refill, i divide the miles driven by gallons used. Can't get more than 21 mpg driving like grandpa...

 

I do my gas mileage calculations the same way that you do and am usually in the 19 to 20 mpg range. I do a mix of stop and go and highway driving. If traffic isn't bad I usually like to stay between 70 and 80 mph. I am mostly stock except for a K&N drop-in, Blaster coil and advanced timing. I have a pretty nasty exhaust leak which I think hurts my MPG. The biggest problem is like most 90's cars our cars come from the factory with ECU tunes that are pig rich!!! Some sort of piggyback fuel controller that would allow you to pull some fuel from the stock tune would probably offer a nice improvement in MPG and a nice performance gain as well!!

 

I get like 15-16 mpg with my 4.10 rear gearing, 5 speed manual and twin turbo motor :P

I really need to change my gearing so im not boosting at 2750 in 5th gear @ 70 mph

Also, like track said, I really dont care much about gas mileage until I get that standalone ecu so I can tune it all differently! I plan on going megasquirt.

 

Whoa 15 mpg....gotta pay to play but I bet it's a lot of fun!!

 

Is it your daily? Yup, I bet is fun.

 

^^ btw, I get 20-21 mpg out of my TT Supra. It doesn't bother me as it has twice the power of my 20 mpg GS. That does bug me...

 

Yup daily driver haha.

 

Using the same methodology as you, My GS averages about 19 mpg, bone stock except 17" w/245s. My SC 300 was about the same when it was daily. Both struggle to better 20 mpg when driven conservatively. Current stock SC 400 Daily beats 20 pretty regularly. Like your TT supra, I think the 2JZ cars just must be pushed harder to achieve my personal speed desire. I drive every car with the same expectations of acceleration and cruise speed, so each car's MPG is a reflection of how hard it works to achieve the same goal.

 

Just wondering what octane you guys are using and do you see a difference in MPG with different octane levels. I use premium (93 octane) not for any particular reason but just because I use it in just about everything I own. I know 93 is what's recommended just wondering if anyone is using something else and of you see a difference?

 

Here in high altitude Colorado, Top of the line 'Premium' is 91 Octane. It always gets the best gasoline my $ can buy, so I do not have any info on running a lesser octane.

 

I only run supreme or premium which is 91 octane here as well. I got a heavy foot with this new twin turbo though!

 

Only premium. Otherwise it pings, which is bad.

 

I was looking around in some other sections of the forum and ran across this.... https://www.clublexus.com/forums/ls4...read-this.html and this
https://www.clublexus.com/forums/ls4...ange-pics.html

Those guys are changing out their coolant temp sensors for a new one and are seeing pretty decent increases in fuel mileage. Some are pulling their sensors out and find years of build up and some are checking resistance in the sensors and finding out that while still within range and not causing a CEL the readings are still off. So I thought to myself I would call the parts store to get one but I kept reading and found that they were seeing better results with the OEM sensor. Checked with my parts guys at the dealer and there is 1 in stock for about $52, depending on how I feel I may put it in tomorrow. I am kind of excited about the possibility of gain to 2 to 4 mpg like these guys. Even if its only a 2 or 3 mpg increase, with an 18 gallon fill up thats 36 or 54 miles extra in every tank. That would put me over 400 miles per tank full!!

 

It's funny i was reading the other day the gas tank in the first gen is300 in the original brochure was like 21.5 gals - i dont want to test that but at 230k miles i get about 300 miles between fill ups and its about 16.5 to 17 gals.

 

i got about 15mpg but i had a heavy foot lol