Best motor oil for high mileage motor

Discussion in '1965 - 1973 Classic Mustangs -General/Talk-' started by 69 302/351c, Feb 14, 2013.

  1. My 69 302 has 178K on the motor..heads have never been off. I have changed cams a coupla times and internals are super clean and still strong. Uses absolutely no oil. My question is what motor oil to use considering the hi mileage and original valves/seats. Oil was changed every 300 miles since new...I am second owner since 1994 and change it every 2000 miles. Any additives?
  2. I've had good results with Valvoline 10w-30 in my '84 GT.

    I do change it every 3000 miles.
  3. I like Valvoline, too. I get the High Mileage stuff.