When I changed oil this weekend, I accidently used a quart of 30HD,
along with the other three quarts of 5W-30. Am I OK to use this until
the next oil change in 3 months, or should I go ahead and change now ?
I'm in North Carolina.
TeGGeR® - 20 Mar 2006 22:03 GMT
> When I changed oil this weekend, I accidently used a quart of 30HD,
> along with the other three quarts of 5W-30. Am I OK to use this until
> the next oil change in 3 months, or should I go ahead and change now ?
> I'm in North Carolina.
Change it.
HD oil contains too much ZDDP. Catalytic converters don't like zinc.

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