Originally Posted By: ARCOgraphite
StevieC:
Do you agree that I have a tensioner issue as Bill stated? Some background: My wifes rav4 2azfe had a tensioner issue, my suzuki AerioSX 2.3L had a tensioner issue - thats three in the past 5 years. Most
non-mechanics would only notice a bit more noise and never diagnose a tensioner sticking. My wife was oblivious to the "chainsaw-under-oil grinding" going on behind the front cover of the rav 2azfe when it stuck its tensioner.
As a son of a mechanic, and a BITOG nut. I'm convinced you need a tensioner. I can't speak as to why in this vehicle or in the others that you have owned, what caused the problem but it sounds like a tensioner to me and not the oil choice.
Millions of cars were and continue to be eqipped with timing chain systems and 99% of those do not require the use of syn oil and these engines go on to see some pretty high miles just using bulk-dino at iff-boob places with terrible quality filters like the entry level FRAM's.
Using a syn oil in the Yaris engine will not offer you any greater tensioner life than the dino will. Syn's advantages, IMO are mainly for extreme temperatures like arctic cold winters and racing/performance engines (not a Yaris engine).
If you need some more food for thought... Think about the Yaris for a minute. It's a compact car aimed at value conscious consumers. Why would they build it to require an expensive oil change using syn when most of their premium performance Lexus models run just fine on Dino? Does
n't make a lick of sense to me. Just to add to the logic that the tensioner is most likely your problem and not the oil.
FWIW all the Yaris vehicles I have seen and/or serviced with my dad, not one has had issues running dino oil and 2 of these handful of vehicles I know don't see regular oil changes and are probably lacking in other areas of maintenance as well.