Quote:
Originally Posted by firebirdguy
changing from normal to synthetic oil will not hurt anything in the engine at all. in fact you could mix the 2 & still cause no problems... most brands offer a "blend" oil which is part synth & part conventional. if you heard that changing/mixing will hurt something that is a myth & totally untrue.
normal oils are not more expensive than synthetics, for any common brand the synthetic will always be more expensive... you can buy normal valvoline for example for about $3-4/qt, their full synthetic is $7-$8/qt.
as for the oil brand question... any name brand oil is perfectly fine for these engines or any non-race engine... its not like penzoil will harm the engine compared to mobil or castrol or quaker state etc etc. todays oils all meet certain minimum specs based on the API grade of sm or sn... they are all fine for toytota engines if you use the correct weight. even walmarts supertech brand is a very good oil proven by countless oil analysis.
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I run commercial mowers and my current mower has a Kohler engine on it. It has been a super reliable motor, but it has had noisy lifters since day one. I usually ran Mobil 1 in it, but when I switched to the manufacturs brand oil (Kohler) the noisy lifters magically went away.
I know toyota v6s are notoriously whiney, so I thought maybe by switching oil brands I could smooth out this current whine. I am extremely particular about my vehicles, and I am certain a lot of folks would not even hear the whine (llike my wife). That is why I think it is internal, and maybe just a part of owning a Toyota v6. It very well could be something else, as I am no mechanic, but there are no leaks and everything has worked great so far on this rig.
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