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2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: Dennis S
Date: March 12, 2019 04:30PM
I've been seeing on the net that mixing brands is OK but mixing or changing weights is not. I'm going back to 10W-30 because that's what it says on the oil filler cap.
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: bik
Date: March 12, 2019 04:40PM
No, not a big deal at all.

In fact, some cars specify going to 5w30 in winter months because it will flow better in cold weather.

The 30 is the more important number because it's the measure of viscosity at operating temperature.

So, better 5w30 than 10w40.
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: Speedy
Date: March 12, 2019 04:47PM
Yep, not a problem at all.



Saint Cloud, Minnesota, where the weather is wonderful even when it isn't.
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: Dennis S
Date: March 12, 2019 04:52PM
Maybe what I was reading is that you shouldn't use mixed weights at the same time.
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: Filliam H. Muffman
Date: March 12, 2019 04:57PM
As bik said, going from 10W-30 to 5W-30 in Winter isn't a huge problem. Be sure to change it before it regularly hits 80 F. The recommendation is sometimes buried in your manual if temps in your area frequently hit negative Fahrenheit numbers.

Mixing brands of the same grade and type of oil is better than going dry, but it should be run long term.



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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: space-time
Date: March 12, 2019 06:24PM
if it was a 2020 model car, I would worry about type of oil. 2002? I would only worry that it has oil.
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: M A V I C
Date: March 12, 2019 07:00PM
Mixing weights is not good, but changing is fine.




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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: mrlynn
Date: March 13, 2019 08:01AM
Used to be that some brands were 'paraffin-based' (Quaker State?) while most were not, and you weren't supposed to mix them. I doubt if this is true any longer.

5W-30 would be better in very cold weather than 10W-30.

/Mr Lynn



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Edited 1 time(s). Last edit at 03/13/2019 08:03AM by mrlynn.
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: Zoidberg
Date: March 13, 2019 11:15AM
First thing I thought of: [youtu.be]



same as it ever was | 109:8
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: mrlynn
Date: March 13, 2019 01:23PM
Quote
Zoidberg
First thing I thought of: [youtu.be]

That white smoke ain't oil.

/Mr Lynn
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Re: 2002 Buick Park Avenue supposed to use 10W-30 oil. 5W-30 was put in last time. Big deal?
Posted by: tenders
Date: March 13, 2019 09:45PM
Absolutely nothing wrong with mixing weights that are close to each other to begin with.
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