SAE 10w30
For an aircooled VW Beetle, use Castrol GTX2. It has the right viscosity.
In my beetle I run SAE30 oil in winter, SAE40 in summer. I change oild religiously at 3K minle intervals without fail. Aircooleds don't seem to like multi-viscosity oils. If it's below freezing out the SAE20W oil is called for.
hi brooklyn, the viscosity of motor oil is how quickly it flows
Low viscosity oil flows easier when it is cold but become thinner when it is hot.
olive oil
decreased temperature
Not usually
5w30
SAE 10W30
I understand you can use the same oil viscosity in both motor & transmission on the 2008 harley roadking!
A motor oil with a high viscosity (resistance to flow) like SAE 50, will be your greatest density motor oil. Low viscosity like SAE 20 will have the least density.
motor oil. higher viscosity better for hot weather, lower for winter