I noticed a lot of people saying they can break 30 MPG going 75-80

I can pull off 33 doing 65 but after 65 My car gets more like 25 MPG

How can some people pull off 30 MPG doing 80? Good maintanence?

Not to be a jerk...But WHY?????

Because I want to know why I cant get 30 MPG past 65 MPH

It is because of the efficiency range of the engine. Most engines are designed to be most efficient around 55-65, with most older ones around 55 due to the national limit. Since highway driving accounts for a lot of mileage on cars, they made it most efficient near this speed. This is the reason you get better mileage at 65 than at 80.

well i noticed a mileage upgrade when i put the Custom CAI on my car, then i always put fuel injector cleaner in once a month, even though i use premium, keep my tires properly inflated, and use the cruise when i get on the highway usually at like 73-75 cause the speed limits here are like 65 but who really follows those silly things anyways?!!!LOL!! Plus regular routine maintenance helps as well and my car came with a magnaflow exhaust system and a new O2 sensor replacement also helped, costed some, but helped. Thats just what i do to my car regularly and what i have done and have noticed it gets really good mileage usually like 20-25 in town driving and 30-34 on highway. i made it once from corinth, MS to Ohio on one tank of gas and the others that i was following had to stop 2 times!!!

If you read in many previous threads, there are so many factors that can cause this. Strangely enough, I notice a lot of the FI cars are getting better highway milage. With you though, the car might just need a tune up or something.

The Series 1 develops it'* tq and hp at a lower rpm. In other words, it doesn't have to work as hard to lope along at 2000 rpm'*.

I cruise 75 at about 2200-2300 RPM. I love my 2.84 gear ratio!

bah....at 70 i hit 1900-2000 rpms

yeah...sounds a little high. I know i run 1900-2000 at 60 though, 100% sure. I think you number might be a little low Pat.