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just back from a 12 day journey in the 22year old ford falcon. we did about 2500KM. the certech is still working miracles, it feels smoother, and using much less oil; in fact about normal now, it was leaking oil down the front of the head from the camshaft bung; so after a few hundred Kms of treatment I cleaned a strip and drove a few hundred kilometers, you can now run your finger along the front of the head it is bone dry; yet below you can see the old residue oil with dust stuck to it, so I lift the bonnet and show people this. it proves the crankcase pressure has dropped. I also put it into my auto trans which used to thump when changing gears; now unless your under heavy aceleration you can`t tell when it changes gear; it`s silk smooth!
Paul Carberry, Australia