Hurray! 17.48mpg to 20.87mpg on 93 Chevy Lumina

[Regenerit]

Yesterday I went to fill up on the expensive $4.28 per gallon Chicago gas prices with my '93 Chevy Lumina and recorded a 3.39mpg increase over its previous 17.58mpg for a total of 20.87mpg, 70% city, 30% highway. EPA estimates are only 20 combined 55% city, 45% highway.
To achieve this, I switched to all season tires from my winter tires, pumped up my all seasons to 35psi front, 40 rear, made sure all of my fluids were filled, put 4 ounces of Lucas Fuel Treatment in my fuel to hopefully clean up injectors, etc, used general hypermiling tactics in city driving, and took out about 10 to 15 lbs of junk from my car.
PS. In 2010, I followed pretty much the same routine and was able to net 20.7mpg from fill up to the next with the same routine. Overall, really excited!

[Frank Lee]

I always inflate the heavy end of the vehicle higher and unless you regularly have heavy loads, the front of fwd cars is quite a bit heavier.

[GRU]

the warmer weather might also have helped. I went from 15.6 mpg on my last fillup to 18.4. For me the warmer weather helps alot more because i only have short runs so the engine is cold most of the time

[Regenerit]

Originally Posted by Frank Lee

I always inflate the heavy end of the vehicle higher and unless you regularly have heavy loads, the front of fwd cars is quite a bit heavier.

I'm a bit nervous to inflate higher since I've checked my tire pressure after 10 mile trips home from school and have found that psi can go as high as 40 front and 45 rear with heat and braking which makes me nervous to want to add more.

[Frank Lee]

Adding more is not what I said.

Your trend is in the right direction though!

[Ecky]

You recommend taking air out of the rears then? Why so?