ENGINE OIL SELECTION

  • Tiny
  • Ashley Milliken
  • 2003 Holden Calais
  • 80,000 miles

Can I use a 5/40 Castrol Oil in the car , Currently running a 5/30 oil

Thursday, September 29th, 2011 AT 2:24 AM

1 Answer

  • Tiny
  • ProAutoTech
  • Expert
  • 298 posts

It will not ruin your car, but hopefully you would run the 40 in the summer and the 30 in the winter.

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Thursday, September 29th, 2011 AT 2:32 AM

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