SAE 30, just like any other lawnmower.......silly answer from someone that doesn't know.
20w-50 is recommended by HD. However many people run straight grades like 50 or 60 weight. I have used a 50-70 multi grade from Penrite for years. I am thinking of changing to a Synthetic as there are several available like 20w -70 from Penrite . This wide range oil would suit Australian conditions which have large temp changes.
1966-1984
on the sump ajead of the filter
The best motor oil for you car depends on the car. Many old cars can only handle regular motor oil.
The last model year for the shovelhead engine was 1984. It was produced concurrently with the new Evolution big twin that entire model year.
Mobile is the the best motor oil
Road Kings were introduced in 1980 with a Shovelhead motor.
best motor oil for 1982 gs 850 suzuki motorcycle
All major brands of motor oil are manufactured to the same standards. To pick a best if impossible. But saying that Synthetic is superior to conventional oil.
What is the best motor oil to use on a 1999 Chevy Malibu?
Motor oil for tmx 155 honda?
The best motor oil for a 1998 Toyota Corolla is Castrol GTX 10W-40. It will help cut down oil consumption.
60w harley oil unless you live where it's hot then use 70w four stroke castrol