[Bigmant773]

Agree with the above. Skip pinning the liners, it’s a bandaid and these engines will run for a good while with a slipped liner.

 

[Bigmant773]

20W oil is not an option for the Thor engine... at least not recommended by the builder according to the WsM:
Engine oil - V8 - low compression engine
Use a 10W/40 oil meeting specification ACEA: A2,
and having a viscosity band recommended for the
temperature range of your locality.
Engine oil - V8 - high compression engine
Use a 5W/30 oil meeting specification ACEA: A1,
(API SJ or ILSAC GF2 for USA).
NOTE: ACEA: A2 can be used.
View attachment 95372

At risk of getting the thread off topic, is there a correlation for oil weight and compression ratios? You know… asking for a friend haha