Yes being there is no lead in the fuel. My experience is that it is rare to have valves sticking in the guides as well.
In general any of the lower compression engines that were not originally rated for 100Oct fuel is better off on autogas.
Obviously opinions vary.
When we where "fish spotting" back in the 90's, our boats brought us "car gas" to burn in our Cubs.
Most of us found that a steady diet of straight "unleaded" regular auto fuel in
0320 engines will most certainly result
in valves starting to "drag" in the guides. If you persisted the valve timing would get so far off the ignition timing they would start to sound like a
"Patridge drumming up on the ridge"[emoji15]
All that was easily cured by adding 1 quart of Marvel Mystery Oil to 55gals of auto fuel. Never experenced ANY problems with auto fuel as long as it had the MMO as an additive!
Pretty common to go through 30/40 drums of fuel every season .
The MMO most certainly effects the valve stems relationship to the guides.
Of course blending in a small amount of lead via AV gas is also an excellent
choice, and we found that as little as 10% was sufficient for valve lubrication! Your mileage will likely vary.............[emoji6]
Sent from my LM-X210 using
SuperCub.Org mobile app