Quote:
Originally Posted by WardL
Some of the additives in fuels are designed to keep deposits out of the engines.
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Ward, I believed that for some years - until I started to look behind the curtain of the "Fuel Sales Pitch Additive".
After I talked to some petrol chemical engineers my mind changed.
Over the years I watched the fuel get worse and worse. Deposits in engines even they fine tuned fuel injected.
These engines (150K +) look in the inside bad - like a carb engine with 100k on the clock never had an tuneup and was planted in a 1977 truck.
Today's engines are pretty sophisticated, but they do not burn much cleaner because of the bad fuel.
What the engine management does, is to recirculate some of the unburned gases and burn it one more time in the CAT. Thus they produce less emissions - that's all.
I experimented with different fuels quite a bit. My lawn mover and generator runs on Coleman white gas and they start at first pull.
Some of my 2-stroke engines cost close to $1K - they only get the racing fuel because they stay clean and run reliable, not because performance.
You should see the difference of deposits between mine and the exact same engines running with pump gas.
Here is a clip to explain why I like reliable engines...
(Two 85CC 25 inch propellers)
G-Pete's P-38M - YouTube