mpj220
Mark have had no complaints on the batch 2549 25/20 fuel which is a pattern fuel. The batch is over two years old and during this time have had no reports of any problems when using this fuel.
It sounds like the engines are pre-det. causing them to run hot. This fuel is an all synthetic oil mix the same as the 20/20 fuel, just more nitro.
Will pull retain and check to see if there is/was a problem in the mix.
Wendell