Question: What is pure methanol?
Answer: If it is sold as pure methanol, it is supposed to be well over 99% methanol. It is a baseline compound that should behave the same regardless of supplier unless it is mixed with something else such as a top end lube or it is contaminated. Water is a common contaminant.? There is a difference in NHRA and IHRA fuels test methods for the methanol classes. The fuel you can run at those events is the fuel that passes their fuel test. I am not sure it would necessarily pass a chemistry lab test however. There may be some differences. One of the Kinsler engineers and others have mentioned observing differences from different suppliers, but I am not sure those experiences were with tested fuels.