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What brand and viscosity of engine oil should I use in my 1999 Cobalt 272 with a VP 454 in it?

Folks, I could use some help here. I have spoken to 3 different dealers and have gotten 3 different viscosities. 10w30, 10x40, & 25w40. 2 of these were for vp full synthetic. Can someone please tell me wht they use in a similar application?
thanx,
dan

On my 7.4l in my 98 Volvo, I used Mobil 1 15W-50. It is in the viscosity range that Volvo recommends in their owners manual. What they do say is don't use an oil like 10W40 unless its a synthetic.

This is the spec from a few years ago. Volvo changes what they recommend occasionally

DanM71 wrote: Thu May 06, 2021 10:27 am Folks, I could use some help here. I have spoken to 3 different dealers and have gotten 3 different viscosities. 10w30, 10x40, & 25w40. 2 of these were for vp full synthetic. Can someone please tell me wht they use in a similar application?
thanx,
dan

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Hey Dan.... welcome to the Cobaltchat forum. So glad you found us!

Check out this oil change thread here.

If you want more technical detailed reading click on our thread here.

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Any pics?

Again welcome aboard mate!
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No matter the forum these oil threads always end badly. My advice any oil is better than none.

Also, join the 272 thread here! viewtopic.php?f=47&t=5008

dustinm wrote: Thu May 06, 2021 7:42 pm No matter the forum these oil threads always end badly. My advice any oil is better than none.

Is half full ok?

Big Block Power wrote: Thu May 06, 2021 7:47 pm

dustinm wrote: Thu May 06, 2021 7:42 pm No matter the forum these oil threads always end badly. My advice any oil is better than none.

Is half full ok?

You bet. that falls under the any category

dustinm wrote: Thu May 06, 2021 8:53 pm

Big Block Power wrote: Thu May 06, 2021 7:47 pm

dustinm wrote: Thu May 06, 2021 7:42 pm No matter the forum these oil threads always end badly. My advice any oil is better than none.

Is half full ok?

You bet. that falls under the any category

Good to know as I'm only half full!

DanM71 wrote: Thu May 06, 2021 10:27 am Folks, I could use some help here. I have spoken to 3 different dealers and have gotten 3 different viscosities. 10w30, 10x40, & 25w40. 2 of these were for vp full synthetic. Can someone please tell me wht they use in a similar application?
thanx,
dan

I used VP 10w-40 full synthetic in my 2003 VP 8.1

I went to Volvo site and it was multi-viscosity oil that I purchased and used last fall. I think it was Volvo Penta 10w-30.

http://www.volvopentastore.com/Engine-P ... ore_id.366

You should get proper advice with this site if you know your engine.

Lockey14s wrote: Fri May 07, 2021 7:15 am

DanM71 wrote: Thu May 06, 2021 10:27 am Folks, I could use some help here. I have spoken to 3 different dealers and have gotten 3 different viscosities. 10w30, 10x40, & 25w40. 2 of these were for vp full synthetic. Can someone please tell me wht they use in a similar application?
thanx,
dan

I used VP 10w-40 full synthetic in my 2003 VP 8.1

Yes that is what our engines called for.