Will 1 Quart of 10W40 mix with 3 QTs of 5W30 Hurt?

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I mistakenly poured 1 quart of 10W40 with 3 quarts of 5W30 Trop Artic in 2006 Malibu Maxx. Will this hurt any? Just want some piece of mind. Thanks all.
 
My wife has an '04 Maxx. I'd run it and not worry about it.
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Originally Posted By: Audi Junkie
...other than making the combined oil worse quality than strait 5w-30.


How exactly? My car never gets cold enough for a 0 weight or 5 weight to make any different. I don't drive my car in -40 degree F weather. The difference in a 40 weight will just thicken the 30 weight oil slightly. People have mixed 5w30 and 15w50 oils without issues in some cars.
 
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Originally Posted By: arly
I mistakenly poured 1 quart of 10W40 with 3 quarts of 5W30 Trop Artic in 2006 Malibu Maxx. Will this hurt any? Just want some piece of mind. Thanks all.


No problem with this mix. Change it at your normal OCI.
 
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