Evil Empire - Electro Man
I came across this yesterday

www.trunkerton.fsnet.co.uk/lies_of_unleaded_petrol...m

Is this an example of the evil oil companies? Or just paranoia?
Evil Empire - 3500S
I haven't got a clue how much of this is true, my chemistry is not great beyond O level (which gives away my age a bit).

However, the bit about lean-burn engines holds water. They were shown to produce lower levels of pollution than cat engines. For some unknown reason the EU opted for cats not lean burn technology.
Evil Empire - THe Growler
I wouldn't be a bit surprised if the account of the anti-Freon campaign on the same site was on the money.

Thankfully we still get RJ-12 in top-up cans in the auto supermarket. Mustangs won't settle for less :-)