Fuel mileage gauge?

[tacomatrdsport2591]

Anyone know where I can find an aftermarket gauge or meter that displays my current [instant] fuel milage? I'd like one for my '87 FX16 GT-S to see how my driving habbits affect my milage on different routes, etc. Thanks alot! =]

[mungo]

For an '87, without the OBDC, I think the best thing to do is get a vacuum gauge? Won't tell you your mileage, but it can give you some indication of better or worse.