I bought a 01 Honda from my neighbor with 167k miles on it. The lady that owned it is 68 and bought it new. I asked her what she used and of course told me she took to the Honda dealer for every oil change about 3 changes a year or every 4k miles. Its in real good shape for the age of the car with just some paint fade and the best part she only wanted 950.00 dollars for it. I was going to use some high mileage oil like valvoline 5w20 semi syn hm but looking on the net Ive seen some people have used 10w30 ,5w30 and 5w20? in the car. What would be best for it?