Yaris vibration abnormality

[talhahs]

Thanks a lot YarisSedan, I shall move back to 91 once I dry up my fuel tank to last bar. Its only been a week on 95, I hope it has not destroyed my engine yet. I will need a refuel hopefully this week. I will not want to go for thorough cleanup as you said earlier (unnecessary costs!)..Any suggestions?

Secondly, about the engine mount problem? How crucial is that and what are its symptoms? How can I get my car to proof that it has engine mount problem?

[CTScott]

Originally Posted by talhahs

Thanks a lot YarisSedan, I shall move back to 91 once I dry up my fuel tank to last bar. Its only been a week on 95, I hope it has not destroyed my engine yet. I will need a refuel hopefully this week. I will not want to go for thorough cleanup as you said earlier (unnecessary costs!)..Any suggestions?

Secondly, about the engine mount problem? How crucial is that and what are its symptoms? How can I get my car to proof that it has engine mount problem?

It is actually a myth that using a higher octane fuel than a manufacturer specifies will cause issues. It will not help anything (some people use higher octane thinking they will see an increase in power or fuel efficiency), but it will not result in more carbon deposits.

Carbon deposits are formed naturally with the combustion of gasoline. Fuel additives are the key to reducing carbon deposits. Using gasoline with Polybutene Amine (PBA) as an additive will result in more carbon than gas with Polyether Amine (PEA) as the additive. Lower grade fuels (not lower octane, but poorer quality fuels) use the cheaper additives and typically have a lower concentration of the additives.


As for the right engine mount; That one is a hydraulic damper and if it ruptures it will lose its ability to damper the engine vibrations. Check for rips in the rubber jacket or evidence that fluid leaked from it. You can also grab the engine block and wiggle it against the mount. It should move freely, but with significant resistance.