Can any one help me , i would like to now how to fine tune my Acura legend Ls, <br>it seems like it burning a lot of gas as i only get about 350 miles to tank of gas on the high way. I would not know if it is burning gas or if it is the optyimal milage. can some one help me.

350 hwy does sound low for "normal" cruising speeds. First check your tire inflation,plugs and air filter. If you have an 86-90 check your distributor cap/rotor and plug wires. After you're sure all that is good do an ECU reset. Just disconnect the battery for a few minutes (make sure your have your radios security code before doing this). Then drive around gently for about 20-30 minutes. The ECU will "relearn" a more economical driving style (a very simplified explanation).

I have a 94 LS Coupe 6 Spd. Driving back from Niagara Falls, where I bought it, I got about 23 miles to the gallon. Most of this 9 hour drive was done between 80 and 90 mph, which translates to around 2800 rpm in 6th gear. That also gave me a cruising range just under what you said you get (approx 15 gallons and 23 miles per = 245 miles per tank). It sounds to me like you are pretty much in your optimal range, especially if you don't have that low 6th gear.