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#1412274 - 03/23/09 03:10 PM Good oil for Vortec 5.7 Litre?
Greg L Offline


Registered: 05/22/06
Posts: 429
Loc: Northern Calif
I did a quick search on this forum & didn't find much about this GM motor.

We just bought a used 1996 GMC Automatic, with 5.7 Vortec motor and 127,000 original miles. I am new to this engine.


Any recommendations on a good oil for this motor? Apparently it takes 5w30.



GL
_________________________
1951 GMC 1/2 Ton 270ci
1991 Jeep XJ 4.0
1996 GMC Sierra 5.7
2008 Jeep Compass 2.4

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#1412285 - 03/23/09 03:15 PM Re: Good oil for Vortec 5.7 Litre? [Re: Greg L]
addyguy Offline


Registered: 09/08/05
Posts: 13419
Loc: Canada
HM 5W-30, any brand, would probably be a good place to start.
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2003 Mazda Tribute LX V-6, 162K miles.
Oil: Edge SPT, PP, and Lucas syn; MPH2 filter.

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#1412290 - 03/23/09 03:18 PM Re: Good oil for Vortec 5.7 Litre? [Re: addyguy]
sparkplug Offline


Registered: 07/16/08
Posts: 862
Loc: Massena, NY
small block chevy's will run on pretty much any good oil. dino or syn
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#1412333 - 03/23/09 03:43 PM Re: Good oil for Vortec 5.7 Litre? [Re: sparkplug]
Greg L Offline


Registered: 05/22/06
Posts: 429
Loc: Northern Calif
Thanks!
_________________________
1951 GMC 1/2 Ton 270ci
1991 Jeep XJ 4.0
1996 GMC Sierra 5.7
2008 Jeep Compass 2.4

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#1412335 - 03/23/09 03:46 PM Re: Good oil for Vortec 5.7 Litre? [Re: Greg L]
PT1 Offline


Registered: 02/06/07
Posts: 5746
Loc: near the mistake
Mine loved 5w30 in winter 10w30 in summer. My brother has too that get 10w30 all year. His both have over 200k on the clock.
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Oils well that ends well...

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#1412356 - 03/23/09 04:02 PM Re: Good oil for Vortec 5.7 Litre? [Re: PT1]
Greg L Offline


Registered: 05/22/06
Posts: 429
Loc: Northern Calif
I have a stash of Havoline 5w30 I am considering using, but wasn't sure if the switch to HM should be first.....


Edited by Greg L (03/23/09 04:03 PM)
_________________________
1951 GMC 1/2 Ton 270ci
1991 Jeep XJ 4.0
1996 GMC Sierra 5.7
2008 Jeep Compass 2.4

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#1412363 - 03/23/09 04:14 PM Re: Good oil for Vortec 5.7 Litre? [Re: Greg L]
ThirdeYe Offline


Registered: 02/23/07
Posts: 6691
Loc: Grand Rapids, MI
My friend uses conventional 5W-30 in his '99 5.7 GMC truck (carryover from 1998, it's a Sierra Classic). He used to just get it done at Wal-Mart that uses Valvoline conventional but I used Quaker State in it last time he had me change it. Runs perfectly, has about the same amount of mileage as your '96, too. I would use your Havoline 5W-30 without hesitation.
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1995 Acura Integra LS - 207,5xx - Valvoline MaxLife Synthetic 5W-30/Purolator Synthetic PSL14459
2001 Honda Civic LX - 56,4xx - Gulf oil/Honda A02

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#1412365 - 03/23/09 04:15 PM Re: Good oil for Vortec 5.7 Litre? [Re: Greg L]
wtd Offline


Registered: 06/25/02
Posts: 1141
Loc: southwest Mo.
I'm using Havoline in both of my 98 chevy trucks. One with the 5.7L and one with the 7.4L. I've had the 98 5.7L truck since new and have used 5W-30 Havoline in it for the last six or seven years and have been happy with it. I wish Walmart was still carrying it.

Wayne
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#1412443 - 03/23/09 05:48 PM Re: Good oil for Vortec 5.7 Litre? [Re: wtd]
Gillsy Offline


Registered: 12/09/07
Posts: 175
Loc: Owego, New York
 Originally Posted By: wtd
I'm using Havoline in both of my 98 chevy trucks. One with the 5.7L and one with the 7.4L. I've had the 98 5.7L truck since new and have used 5W-30 Havoline in it for the last six or seven years and have been happy with it. I wish Walmart was still carrying it.

Wayne

Our local WalMart just discontinued Havoline as well. Not happy! I thought it could have been a marketing thing. Are they dropping it nationally?
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#1412525 - 03/23/09 06:58 PM Re: Good oil for Vortec 5.7 Litre? [Re: Gillsy]
jstutz Offline


Registered: 10/06/08
Posts: 1472
Loc: NC
these engines appear to be very easy to please. i have seen them run on regular dino 5w30 to HDEO 15w40 to synthetics. I would say more importantly that what oil you use, make sure that there is no antifreeze in your oil from a seeping intake manifold gasket. this is very common on the gm 4.7 and 5.7 engines. I have three Chevy trucks and that intake manifold gasket has went out on every one of them. My trucks are 93 1500, 99 sub, 02 blazer. Im not sure what all year models are affected by this. it is when they switched to dex cool that people started noticing the problem. Please do a google search for this problem and you will find all the details.

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#1412536 - 03/23/09 07:03 PM Re: Good oil for Vortec 5.7 Litre? [Re: jstutz]
Greg L Offline


Registered: 05/22/06
Posts: 429
Loc: Northern Calif
I investigated the dipstick & checked the gaskets before buying the truck; all seemed well.
_________________________
1951 GMC 1/2 Ton 270ci
1991 Jeep XJ 4.0
1996 GMC Sierra 5.7
2008 Jeep Compass 2.4

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#1412576 - 03/23/09 07:22 PM Re: Good oil for Vortec 5.7 Litre? [Re: Greg L]
Rob_Roy Offline


Registered: 10/26/08
Posts: 829
Loc: Northern, NY
The intake gaskets seem to be much more of a problem on the Vortec engines. It has also been my experience that these engines are not sensitive to oil brand or viscosity. We have run them on 5w30, 10w30, and 15w40 in the high mileage ones with great results. One 350 in particular has 200,000 miles on it, still doesn't consume or leak any oil!
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#1412609 - 03/23/09 07:54 PM Re: Good oil for Vortec 5.7 Litre? [Re: Rob_Roy]
ArrestMeRedZ Offline


Registered: 11/11/08
Posts: 646
Loc: Las Vegas
I have a '97 C2500 with the 5.7L Vortec. I used M1 10-30 for the first 7 years of it's life, then switched to German Castrol 0-30. I'm now running Penzoil Platinum 10-30. It's loved all of those oils.

When I took the intake manifold off at the 8 year point (because of the Dexcool destroyed intake manifold gaskets) the oil passages were clean enough to eat off of. Fortunately, the gasket coolant leaks were to the outside of the motor. I'll bet your truck has had those gaskets already changed, but keep an eye on it in case it doesn't have the upgraded gaskets.

Unless you know the maintenance history, I'd do a full fluid swap. Brake fluid, coolant, transmission, and differential (especially if you have limited slip).

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#1412936 - 03/24/09 06:58 AM Re: Good oil for Vortec 5.7 Litre? [Re: Greg L]
NHHEMI Offline


Registered: 07/06/07
Posts: 5069
Loc: NH
 Originally Posted By: Greg L
I did a quick search on this forum & didn't find much about this GM motor.

We just bought a used 1996 GMC Automatic, with 5.7 Vortec motor and 127,000 original miles. I am new to this engine.


Any recommendations on a good oil for this motor? Apparently it takes 5w30.



GL


Personally I would run a 10W-30 High Mileage but if you want to stick with the 5W-30 do a HM there as well( IMO ). I recommend Valvoline MaxLife.


Edited by NHHEMI (03/24/09 06:59 AM)
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2014 Jeep Cherokee
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#1413426 - 03/24/09 03:14 PM Re: Good oil for Vortec 5.7 Litre? [Re: NHHEMI]
Greg L Offline


Registered: 05/22/06
Posts: 429
Loc: Northern Calif
Any preference for the tranny fluid and rear end?
_________________________
1951 GMC 1/2 Ton 270ci
1991 Jeep XJ 4.0
1996 GMC Sierra 5.7
2008 Jeep Compass 2.4

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