Just my $.02....
I rebuilt a 2.0 air cooled last summer for a friend...he was (and has) run 20W50 Amsoil synthetic for 10 years in the engine...yes it was a little wet on the outside, but inside it was clean like it had just been built...one of the easiest rebuilds in decades for me (considering the two before that were grenades)...
I bought a case, and will be freshening the o-rings and seals on my engine and switching it up...yes it was that impressive...
The other DennisNear Toronto Canada.
    On Monday, March 12, 2018, 6:29:37 p.m. EDT, Chris S <szpejankowski@GMAIL.COM> wrote:  
 
 Motorcycle oils are designed for wet clutch operation unless otherwise stated. Check the label. 

You can run Mobil 1 15w50.  I buy mine at Wall-Markt. 

Chris

> Wiadomość napisana przez S DaRoota <sdaroota@GMAIL.COM> w dniu 12.03.2018, o godz. 17:24:
> 
> I hope it wasn't for a Wet Clutch (motor cycle oil)
> 
> Also FYI, if you have an old setup, it may CLEAN your seals/seams out from
> any gunk, and cause your seals to leak oil if they are old.  A rebuild can
> handle synthetic, but a old engine with old seals will leak 90% of the time.
> 
> I prefer Lucas Magnum  ( Lucas SAE 15W-40 Magnum High TBN CI-4 Oil)  as it
> has the right ZINC additives as well to reduce wear.  This oil is
> advertised as a Diesel oil which makes no difference really.
> 
>> On Sun, Mar 11, 2018 at 9:38 PM, thewestyman <zolo@foxinternet.net> wrote:
>> 
>> I bought this oil because the burning temp. is much higher than ordinary
>> oil, because my van is an air-cooled one.
>> Any thought on this by anyone?
>> Zoltan
>>