[ken33]

Hey anyone know what oil comes in 2009 malibus from factory,i heard from one dealer they thought it was mobile -not mobile 1 synthetic,just plain mobile 5w-30.I have always used ac filters and penzoil 10w-30...Should i stick with 5w-30 or 10w-30. I live inthe south so weather isnt to cold long,30-40 degrees. I am thinking about trying mobile oil if that comes from factory....anybody know..........Thanks

 

[Silver LTZ]

Regular, not Mobil 1. I run Mobil 1 now though.

 

[elcompaLalo]

Mobil 1 full synthetic here, just stick to 5W-30W IMO.

 

[engineer25]

The factory will use what ever oil they get for the cheapest price in bulk. I would use whatever brand you are comfortable with, but would also stick with 5w-30.

 

[realoldman]

I was told by the dealer not to use synthetic but to use Regular oil the first one or two oil changes. This will allow the rings to seat better. After that it is ok to use synthetic.

 

[Silver LTZ]

I was told by the dealer not to use synthetic but to use Regular oil the first one or two oil changes. This will allow the rings to seat better. After that it is ok to use synthetic.

That is an old wives tale. Even some GM cars like the Corvette come with a Mobil 1 factory fill....so it has synthetic at 0 miles....

 

[Malo83]

Stick with the 5W30,I run Pennz Platinum with Wix filters on my LTZ

 

[bballr4567]

Stick with the 5W30,I run Pennz Platinum with Wix filters on my LTZ

Same here except for the WIX.

The Pennz is about the best oil on the market right now (search bobistheoilguy for the info). Its cheap, great and very plentiful to find.

 

[ken33]

I am leaning toward using 5w-30 pennzoil and ac filter,bought ana ac filter and does not have the o-ring in it for the cap...killin me...I guess thats a dealer item.Anybody know if it is......With fram it comes with filters....but 4.49 ac to fram 9.00....

 

[elcompaLalo]

I am leaning toward using 5w-30 pennzoil and ac filter,bought ana ac filter and does not have the o-ring in it for the cap...killin me...I guess thats a dealer item.Anybody know if it is......With fram it comes with filters....but 4.49 ac to fram 9.00....

If you were to use a synthetic oil just get the oil filter with the replacement O-ring and swap it. The extra 2,000 miles the synthetic oil will take you can help offset the extra bucks you paid. Just my .02 cents, not that I think you must change it but it couldn't hurt.

 

[ken33]

Why stick with 5w-30....What about 10w30 isnt it ok in warmer weather....

 

[jeepgrady]

You should stick with 5-30 because that's what GM recommends. Simple enough.

 

[bballr4567]

Why stick with 5w-30....What about 10w30 isnt it ok in warmer weather....

If it doesnt get below freezing than 10w30 should be good as long as its a quality oil.

That being said, just stick with 5w30. There is never such a thing as too much protection when dealing with cold starts.

 

[BillD64]

Stick with 5W30 dyno oil. When the oil is hot it is the same viscosity as the 10W30 and has a better viscosity for when the engine is cold. Even when its 70 degrees outside. If you use synthetic the OLM (which uses temperature and time to determine oil life) will not know that and will drop down at the same rate as it would with dyno oil. While you are under warranty you need to follow the factory oil change intervals which depend on the OLM. Trying to get the extra usage (miles) that synthetic can give you will not work as you will still be tossing the oil when you would have tossed the dyno oil.

Bill

 

[JasonZ34]

Most tests I've read still say that good synthetic oil protects better. Even if you do throw it away sooner I think it's worth it. But each individual needs to do their own research.