I had a guy on the phone at the start of the week thinking his RX-8 was dead due to the amount of smoke coming out of the exhaust.
The car and been to a Mazda dealer compression tested etc and all was o/k and they did not know what was wrong other than it probably needed a new engine :o,
After a conversation with him it turned out that last week he decided to "treat his cars" and put Comma longlife 5w30 fully synthetic in his Subaru and his RX-8!
Once he told me this I told him to just get a couple of oil changes carried out with a cheap 10-30 or 10-40 mineral oil to try and flush the system,
Result, he rung back yesterday to tell me he now has a smoke free RX-8 and is over the moon that his car is OK :King:Thumbsup!