I'm taking care of my late father's '67 Corvette. It has the 390 hp 427 big block. It was fully rebuilt about 8 years ago to basically stock specs. It was broken in on Valvoline VR1 20w-50 and has been running Mobil 1 15w-50 since then. The car mostly just sits in the garage now; it gets started and driven for an hour or two about 3 times a year. I change the oil in it every other year.
WalMart apparently stopped selling 15w-50 since I last changed the oil in this car. The only other place to get it is at Napa for over $8/qt. I don't know if it's even necessary to use such a heavy oil, I'm just doing the same thing my dad did. This oil recommendation came from either the previous owner of the car or the engine builder, I'm not sure which. The car's owner's manual gives no recommendation on viscosity at all.
I'm not sure if I should just stick with what works and pay extra for the Mobil 1, or try to find a cheaper and potentially BETTER (<--- not just being cheap) alternative. This will hopefully be the last oil change I do to this car as it is going up for sale this year.
WalMart apparently stopped selling 15w-50 since I last changed the oil in this car. The only other place to get it is at Napa for over $8/qt. I don't know if it's even necessary to use such a heavy oil, I'm just doing the same thing my dad did. This oil recommendation came from either the previous owner of the car or the engine builder, I'm not sure which. The car's owner's manual gives no recommendation on viscosity at all.
I'm not sure if I should just stick with what works and pay extra for the Mobil 1, or try to find a cheaper and potentially BETTER (<--- not just being cheap) alternative. This will hopefully be the last oil change I do to this car as it is going up for sale this year.