If there is one engine in the history of the internal combustion engine that is known for being failure prone, it is the Chevrolet Vega 2300 I-4. It was an aluminum block with a high silicone content; and supposedly acid-etching the block left silicone granules exposed as a durable 'wear surface' for the pistons. In reality, the process never worked, and the bores wore out the pistons in no time. There were other problems with the engine, such as leaking valve-stem seals, but this one was what caused the main engine failure. In looking at posts on 'Graphite Oil'; I found two posters who said that this oil worked really well in the Vega engine, and one said the Vega engine was really reliable! What I'm wondering is does anyone else have any stories about a Vega engine, and more specifically, did anyone find an oil or additive that made this engine last a long time....any 'high-mile' Vega accounts'?