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.
nosmo snipped-for-privacy@yahoo.com wrote in news: snipped-for-privacy@j33g2000cwa.googlegroups.com:
Change it.
HD oil contains too much ZDDP. Catalytic converters don't like zinc.
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