"Free" Toyota Care oil changes in my 2012 are done. Synthetic or conventional oil?

[trunkout]

Originally Posted by fnkngrv

LOOKING AT, FEELING, AND SMELLING OIL IS NOT A VALID WAY TO DETERMINE IF IT IS STILL GOOD OR DIRTY!

so if I look at my Mobil 1 Full Synthetic oil BRAND NEW and oil that I used for 10k miles in a glass and they look IDENTICAL that is NO indication???

[nookandcrannycar]

What Exiwolfman and roxy1 wrote yesterday .

[fnkngrv]

Originally Posted by trunkout

so if I look at my Mobil 1 Full Synthetic oil BRAND NEW and oil that I used for 10k miles in a glass and they look IDENTICAL that is NO indication???

Well I don't know about you but my eyes cannot detect things at a molecular level.

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[UberSilver]

Originally Posted by trunkout

so if I look at my Mobil 1 Full Synthetic oil BRAND NEW and oil that I used for 10k miles in a glass and they look IDENTICAL that is NO indication???

That seems a bit far fetched. When I change mine once per year, it's too clear too see on the dipstick when new. At at 10k it's still Yellow, but visible on the stick.


Also, did you do a taste test? Mine taste like Lime when new, but by 10k miles it's got a Lemon favor to it.