[Irish Eyes]

My Jag gets peak gas mileage at 70 as well.

So does my TR7.

How do you find out these things?

[calex59]

Well, I am sure there is a scientific way to do it, but I drove my TR7 at various speeds on long distant runs and recorded the gas miliage. Always does best at 70 as long as it is tuned up. I have an old VW bug that does best at about 65, altho truth to tell it doesn’t vary much at higher speeds either.