Originally Posted By: Gene K
Originally Posted By: OVERK1LL
No, it doesn't have an oil cooler and I'd use whatever 5w30 I could find on sale. They are pretty stout motors.
The oil cooler was a factory option on those trucks. It used the oil filter base like the Police Cars.
Any SN/GF5 5W30 or 10W30 would be fine. Ive seen any number of those 305 and 350 engines with 300,000 - 500,000 miles on them with conventional oil changed every 3,000 - 6,000 miles depending on conditions.
Must have been a rare option, I've never seen one! LOL!