Hi Scotty. I just watched your video 20 Things Only Stupid People Do To Their Car. I noticed you recommended people only use synthetic engine oil with no mention of mineral oils. I’ve only ever seen car enthusiasts and motoring journalists recommend mineral oil for classic cars, like most models manufactured before unleaded fuel was mandated in the 80s. In your view, would it be safe to fill and run a 50s, 60s or 70s car with synthetic oil?
I would use synthetic blend in the old cars but not pure synthetic. Waste of money.
Just wanted to point out again that while synthetic works fine, this advice is correct and you CAN use semi synthetic to save money. Nothing wrong with that.
I've used synthetic oils in classics for YEARS and they have been fine. As @Doc said, you can also use a synthetic blend.
Some monograde oils, primarily SAE 30 and SAE 50, are still easily obtainable. But synthetic oil offers better protection, lasts longer, and works better.
Mineral oil is basically oil derived straight from crude. Synthetic oil is man-made with additives, etc. Neither of these will harm a classic motor.
Bear in mind as well that many classic cars are running newer powerplants, especially muscle cars, as guys who want more power find it cheaper to drop in a modern fuel injected motor than try and build the old carb engines. In those cases, you NEED to go full synthetic.
