I usually use Castrol GTX Synthetic 5w30 oil in my car and accidently for
the 10w30 but the same brand....Is this still okay?
It's just different thickness when it's cold. When it warms up 5W30 and 10W30 have the same viscosity. Hence the "30" in both the grades.
Jay
One huge aluminum wing - $200
More vinyl graphics than your ride can handle - $150
Decals for products you don’t even have - $10
500lbs of Car Audio equipment in the trunk - $1500
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Getting slaughtered by a KIA - Priceless
