2005 Pontiac Grand Am oil

2005 PONTIAC GRAND AM

83,000 MILES • 6 CYL • FWD • AUTOMATIC

SLAZA

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I bought car @26000 miles every 3000 miles i change oil and use castrol syn blend 5W30. today i put in 10W30. I live in dallas, texas. Any adverse affects?? Go back to 5W30 when?? Next change?? car runs perfect.

Aug 4, 2009 at 8:56 PM

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