[Titanium]

I am interested in buying a MPG gauge for my 1991 Lexus LS400 if there is one currently made that will work with this car?

I bought this car over two years ago with 160,000 miles on it and now I have 212,000 miles on it. I maintain this car better than the factory manual suggests also. My work commute is 80% Highway. The LS400 has a drag coefficient around 0.29. The smooth running V8 in the car hits around 2,400 RPM at 60 mph and around 2,800 RPM at 80 MPH. I am getting around 21 MPG in this car average, but I drive it at 80 MPH on the Highway.

This car did start getting worse than normal gas milage this summer. I read the main gas milage killer in these cars can be the engine block coolant temperature sensor, so I replaced that sensor with a factory Lexus sensor. I gave the car a complete tune up with new Lexus spark plugs, new air filter and cleaned out the throttle body. I also switched to using ethanol free gas. 90% of the gas available in my state has ethanol in it, but there are a few stations that carry the ethanol free. All of this did improve the MPG with this car. I recently just put in Chevron Techron fuel system cleaner in the gas tank. I also bought some Red line SL1 fuel system cleaner that I will use later. I read there is a higher concentration of the chemical in the Red Line brand vs the Chevron that really cleans your fuel system on the bob is the oil guy forums. I used to only use Chevron high octane gas with ethanol and Techron in it, but since the switch to ethanol free no name gas I decided to add fuel cleaners to the fuel in my car just as preventative maintenance.

I am wanting to use a MPG gauge on this car and slow it down around 65 MPG on the highway and try to get well over 25 MPG with this car.

I bought the Lexus after I sold my 1997 Honda Civic HX that had almost 300,000 miles on it. I sold the HX due to it needed quite a bit of money put into it to go another 100K miles. The Civic HX is a fantastic car.