I have 209,000 on the speedo and it runs as good as new except for the smoke!!! I had a mechanic look at it and he says the valve guides are the problem. I got the truck for 400.00 dollars and it wasn't running because of a bad crankshaft. I went to buy some high mileage oil and I hope this helps a little until I get the valves done. thanks for the help everyone!!! I will post some picks of it soon.