A 1987 Acura Integra LS four door hatchback with the "Brown Top" twin cam engine.

Ah

It's light sky blue.

If I can't get it back up to 25 MPG average, I don't know where to go.

Now it's barely getting 20-21 MPG.

Doubt you're gonna do that. If its that old, the engine is getting loose and it's a little down on power

That's not even bad gas mileage

For a 1.6 liter I4 with a fuel injector it's not very good...

It's an 87

Fuel injection back in those days was very primitive and rudimentary, not to mention the cars were heavily restricted with equally archaic emissions controls

It used to get 25 MPG in 2019, but since then it's been drastically going down...

Maybe it's how I'm driving and how often I do it?

I know the slush box doesn't help.

Honestly sounds like the engine is just aging and getting wear ad tear as it goes along

Is there anything I can do to keep it in one piece and improve the performance back to how it was? Or is it not worth it...?

Getting a new engine

They all develop wear and lose mpg overtime

A new engine?

How?

What engine?

What will even fit?

Talked to another friend, he said to do some basic work on somethings that will help. Oil and fluid changes, air filter, spark plugs, and that kind of thing.

Very old header

very very old

How old Is your header? Mine is 50

Mine is probably from the 70s or the 80s

I posted this in gaming but I think it can fit here too.

It could

D O R I F T O

Tesla

Which Tesla is that

Model 3?

yeah 2021 Performance

she fast

Nice!

that come off a small block chevrolet

Yep

350 in my vette

c4?

Heh