V2Rocket

called CASIS, something like computer assisted shift indication system or some damn thing

like said before its just a basic fuel economy meter, it takes a general reading of engine speed and throttle position (well, if youre not either idling or WOT) and figures that you are cruising and tells you to upshift at a certain rpm to maximize fuel economy.

El Commandante

There is a whole section in the owner's manual on this. Its actually quite interesting especially for an 80's car

FRporscheman

The arrow tells you you need to go faster. Or be a sissy and shift up. Your choice!

I actually like it. Who am I to argue; I drive with a varying level of logic, while the computer is based solely on logic. And I find when I actually obey it, I get better fuel economy, which is great these days. I wish my 968 had one, and a MPG gauge.

bbourdon

I just thought is was to tell stupid old rich women when to shift. Old saab's have them, too.

DarylJ

And....no surprise...late 80's and early 90's VW Jettas.

Dougs951

Hmm is this an early option only? I don't seem to have this.

FRporscheman

All the early cars had it and I think maybe some late ones, but I don't think turbos ever had it.

El Commandante

I have it on my 86... so depends on if you want to call it early or not. My suspension is early, but everything else is updated

DarylJ

Not sure on specifics, but my 85.5 has it.

Darwantae951

951s didn't have it AFAIK.

Is your car a 951?

El Commandante

No, NA sorry.

jstand22

Yeah I think it became an option after 85.5, my 87 S has it, but I rode in another 87 944 n/a that did not.

Pcar944

It was an attempt to get around CAFE standards in the 80's

If you put in a light telling people to shift (early), then govmt testers can hardly claim worse mpg and up your taxes.