My Brother-in-law just bought an 85 Ram Charger. Unsure of the mileage. Could be 77,000 or more likely 177,000. Who knows. Looks and drives good for an older vehicle. Truck has a tiny leak and probably consumes a little. He's leaning toward putting in an oil with a long life name, such as Pennzoil LL. I said that should be good, just get something thick, like a straight 30wt or a thicker multigrade like 15W40. The 30wt can be run pretty much year round and might stop the leaking on the driveway. I know someone who does so in this climate without starting problems on older engines. The 15W40 would be better overall but might not stop the leak in the driveway. Any suggestions? Am I way off base?