Toby@ToyTuning.com
Banned - DO NOT BUY FROM TOYTUNING
We don't personally use fully synthetic on the older engines, fine on full rebuilds we find and we rebuild a lot of Starlet engines but even for most we still use a semi synthetic, good quality ones, and we do use you as suppliers as well. More looking for information than saying you are wrong.
I understand your theorys and can't fault them, hell I am by no means an "oil" expert except that experience from our end has shown that problems do arise with fully synthetics on these engines.
I can completely understand that a 5w40 fully is the same as a 10w40 semi at operating temperatures but why when for instance when tapping occurs does a 10w 40 semi quiten it down when compared to a 5w 40 fully? I'm asking as I need an explanation as on paper the operating viscocity should be the same?
We all obviosuly want extra performance through less viscous drag but can you tell me more info on the above, more for my own learning as from what you recommend we just find too many issues and sticking to a semi 10w40 seems to work wonders.
Thanks for any help.
Toby
I understand your theorys and can't fault them, hell I am by no means an "oil" expert except that experience from our end has shown that problems do arise with fully synthetics on these engines.
I can completely understand that a 5w40 fully is the same as a 10w40 semi at operating temperatures but why when for instance when tapping occurs does a 10w 40 semi quiten it down when compared to a 5w 40 fully? I'm asking as I need an explanation as on paper the operating viscocity should be the same?
We all obviosuly want extra performance through less viscous drag but can you tell me more info on the above, more for my own learning as from what you recommend we just find too many issues and sticking to a semi 10w40 seems to work wonders.
Thanks for any help.
Toby
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