Hello everyone..I just picked up a 78 monte carlo with a 305 in it. No leaks or burning of oil that I can see. The car has 47k original miles on it and I was wondering which oil to use and if a synthetic or synthetic blend has enough additives in it to be sufficient in that engine. Or should I just stick with a regular dyno oil? Ive read on the forum of people using Mobil 1 with good success. Any help would be very greatly appreciated..Thanks again