Blue smoke means oil burn - Chicago Tribune
Q: Do you feel the service advisor was being deceitful when he told me over the phone that the piston rings were wearing inside the engine of my 2003 Toyota Camry and that it would cost a minimum of $1,000 to repair. I was told by the owner that they do not lie, cheat or steal and the service advisor would not lie to me because he would get fired. A: From the ton of information that accompanied your question, we see that the original problem was blue smoke from the tailpipe. Valve stem seals keep consumption to a controlled minimum and worn ones are the most likely cause. They can also do a cylinder leak-down test or compression test to see if the piston rings are bad, but we doubt that they are. Q: I have two Mazda B3000 trucks and they are having the same problem with the air conditioner. After they have run for 10-15 minutes, the air flow smells humid and is hot. if I turn it off for a few minutes, it starts working again for 10-15 minutes. The other strange thing is that if I open a window a crack, the A/C works much better, either it works constantly or continues to work for another 30 minutes until the problem resumes. A: This is a very common problem that is not isolated to Mazda. Source: articles.chicagotribune.com
