Hi,
"Semi-synthetic engine oils are produced in a complex process, but are therefore considerably better quality, especially their aging resistance and thermal properties."
I think there's something wrong here about the grammar of the underlined part. Shouldn't it be "but are, therefore, of considerably better quality" or "but are, therefore, considerably better in quality" or "but have, therefore, considerably better quality" ?
I'm also doubtful about the use of 'but'. Shouldn't it be 'so' or 'as a result' ?
Thank you.
I think there's something wrong here about the grammar of the underlined part. Shouldn't it be "but are, therefore, of Yes considerably better quality" or "but are, therefore, considerably better in Yes quality" or "but have, therefore, considerably better quality" ? , I'm also doubtful about the use of 'but'.
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I think there's something wrong here about the grammar of the underlined part. Shouldn't it be "but are, therefore, of Yes considerably better quality" or "but are, therefore, considerably better in Yes quality" or "but have, therefore, considerably better quality" ? ,
I'm also doubtful