Greg,
Ive only made the 1 batch of modded olive oil, next batch I will try an even greater quantity of glycerine as there was very little sediment after the simmering process( it was less than when useing the cheap blended vegi oil). The olive oil was noticeably thicker after modding, but not as thick as castor.
If previouse users of the modded cheap cooking oils have not experianced any undue wear , then I cannot see any problems with the olive oil.
When doing the modding , 1 must consider the overal cost of the olive oil and the amount of glycerine used , as the qty of glycerine goes up the added benefits will decrease, so an acceptable cost/performance must be decided on.
My test blend was on the short side of lube oil at 20% , but I did this to see if the viscosity was high enough - it seems to be. I didnt note any difference in the running temp or noise of the motor so I can only pressume the lubrication was adequate, only long term will tell if the gudgeon pin is suffering.
Stewart