Don't know of a link. But I can attest that my 2007 Mazda 3 2.0 has 120000 on the odometer. I did a compression test at about 115000. The results were 190 187 185 188. That's each cyclinder. The ideal is that average of all the numbers be no more than 10% of the highest cylinder. The other part is making sure the cylinder is holding the pressure. According to this test my engine is very healthy. I don't autocross but I am know to lay the hammer down. The engine is fully bolted with a full race exhaust. And the computer is custom tuned specific for this motor. So I dont drive for fuel savings. Non the less I get about 25 MPG on long trips. 330miles per tank. And during city / highway driving roughly 290 miles per tank. I change the oil religiously every 5000 miles. I've always used mobile 1 full synthetic. I take active car and although the engine isn't close to 200000 miles, I've never ever ever ever had an issue with the engine. At least that didn't result in a bad spark plugs being changed or a defective old coil pack being replaced. And that was at about 100000 miles. That being said that was one of the last year's they used a fordmoco engine. So...for what that's worth.