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Old 08-12-2006, 03:01 PM   #4
Brian R.
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Re: 5w-20 GF-4 oil Toyota approved for all Lexi engines March, 23 2006

I wonder if there is any difference in top-end performance between 0W-20 and 5W-20? The 5W-20 should have more base oil and less VI improver since the difference in cold-hot engine viscosity doesn't need to be as much as in the 0W-20. Or maybe the 5-weight base oil has better (or worse) lubricating properties than the 0-weight base oil.
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