Fow many years I refused to use ethanol because it is not good for your engine
It still isn't. Ethanol is hygroscopic. The water it retains can cause rusting of parts in the fuel system. Special gaskets material must be used to handle it. There are basically only two reasons for using it as a burn moderator:
1. It's heavily subsidized. So much so that it has basically destroyed the sugar cane industry in the States. A side effect, of course is all that corn syrup being used as a sweetener these days.
2. Catalytic converters (effectively a pollution to pollution converter) are mandated on cars, along with their attendant costs in rare earth metals to construct them (why people steal them...they are VALUABLE!). These devices don't do anything useful, and are poisoned by TEL (tetraethyl lead).
TEL has advantages:
1. It also acts as a lubricant.
2. It also acts as a coolant.
3. It WAS cheap until it was outlawed.
4. It is a superior burn moderator, much more effective per ounce.
5. Fuel separation issues don't occur with TEL. They do with ethanol.
Burn moderators are necessary in gasoline used in cars because cars compress the air in their cylinders to aid combustion. Their purpose is to keep the gasoline from burning too quickly, resulting in a 'push' rather than an explosion (a ping) in the engine. Pings are damaging to the engine and don't produce much power.
Older cars were particularly subject to ethanol corrosion. The stuff isn't compatible with the gaskets used in older cars and fuel leaks would also develop.
Your reason for not wanting to use ethanol has backing, particularly for older cars.
Ethanol is not allowed in engines for small aircraft. It causes the engine to fail in flight, usually due to fuel separation (the moderator comes out of solution). This can happen more easily at high altitude or low barometric pressure (such as a storm).