[Del]

I have basically used only Chevron with Techron in my Alfas, and have never ever had a dirty injector problem. If I cannot find Chevron, I maybe buy the small can of Techron to add at a filling.

I don't know about other cleaners. I'm sure, though, that there are other cleaners which may work, although I suspect some of the older "heritage" brands are not as effective for modern engines.

 

[Del]

I don't think that if there is ethanol in the gas, that is affected by the addition of a cleaner such as Techron, since it's for a different purpose, keeping the injectors clean, etc.

We in WA State also have ethanol, and as far as I'm concerned it means nothing except a little worse fuel mileage. No real effect otherwise. It's just a subsidized addition for the farmers.

I also would guess that using a cleaner takes more than a one time use if the system is filthy, from using lower cost fuel without cleaners for a very long time.

 

[Del]

Don’t gasolines for different brands often come from the same refinery? And don’t they all claim to have a proprietary formula to clean and protect engines?l

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Oh, I'm sure they do, and that's fine. My experience is with Techron, that's all. People use whatever makes them happy.