1. in a sustained heavy load environment I would not use bean oil, been there done that with 727, the results were a gummy mess.
2. We won the Baja 1000 and set 2 world endurance records with day time temps over 100 and part of the course was a 5 mile hold it pinned in 6th sand wash using yamalube r at 32:1 and 50:50 trick 110 octane and 93 pump.
3. The last 24 record on the same course was set running a USED ebay 240 cylinder piston and rings. I used Amsoil dominator at 40:1 with the same 50:50 fuel mix. At the end of 240 hours of hard wide open running the compression was basically the same as we started with.
Proper setup. proper jetting. good oil and the proper fuel are all key elements.