The one I'm using it's Klotz and it's synthetic so I'd continue to use synthetic. I'm impressed with your collection, and for me it may take years to get the collection. I'm planning to get another plane Seagull's Sea Fury, which I'm still waiting on money. I had started a thread of picking out one engine out of two and which is gonna be your choice that was the thread, it was between DLE20 and Mintor22, I was planning to get Dewoitine D.520 I was told, it ain't gonna fly good, or it would be difficult since it does not have bigger wing area, so I switched on Sea Fury both by Seagull models.
I have mixed up two gallons of fuel with 8 oz of Klotz synthetic. Anyway, I had been advised to get another DLE20 since I wanted to try Mintor22, though I love DLE20. Anyway, after I'm gone through my two gallons of fuel, you want me to switch to Stihl Ultra synthetic and go from 32:1 to 40:1? People have advised me to continue to use 32:1, as I'm a newbie to gas, and including you everybody's advices/suggestions I take respectfully here but, it's kinda making me perplexed.
As far as that big pasture you've mentioned, I don't think anyone's gonna go for it, since most of the people are around 249, 1488, 2978, 1774 and so on. We've been given an offer by Sparks club as I mentioned in my PM, but I don't think people are gonna take it, since our club's charges were dirt cheap as other clubs around.