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06-24-2010, 06:44 PM #1
- Join Date
- Jan 2008
What oil are you using in your GM?
I usually us Valvoline or Mobile Synthetic oils.
I am looking into Amsoil. For the new 2010 4.8 Silverado.
What are you using?
Sorry if they're is already a topic on this. I searched and found nothing.
06-24-2010, 10:33 PM #2
- Join Date
- Jan 2010
I dont know if this helps you, but I have a 05 silverado z71 and im using Royal Purple for my 5.3l vortec.
06-24-2010, 11:04 PM #3
Mobile 1 5w30 synthetic.
07 NBS Crew cab SLT 4x4
06-25-2010, 09:13 AM #4
06-25-2010, 09:39 AM #5
I use Mobil 1. I've ran it in everything from my 7 sec (1/8th) CRX Racecar to my wife's Lancer. Very good oil, never had any issues with changes in viscosity or pressure. If it is approved by Honda, it's obviously good, because they have one of the highest oil standards amongst car manufacturers."If orange juice had armpits, maybe."
-the wife in reference to the smell of JOOSE
06-25-2010, 10:58 AM #6
- Join Date
- Feb 2007
- Blog Entries
I use Castrol High Mileage 10w30 in my car and both trucks. Seems to work well and it's nice being standardized in oil weight amongst all the vehicles. I think they all call for 5w30, but with the heat down here, I figure 10w30 works just as well if not better.Christopher
1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
2005 Saturn ION-2 Stock 265K miles
1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half
There are 10 kinds of people, those who understand binary, and those who dont...
Remember kids, the only difference between screwing around and science is writing it down- Adam Savage
06-25-2010, 11:47 AM #7The Cheap-*ss Modder & Thread Killer
The Realist says, "The glass is too big".
2013 GMC Sierra 1500 SLT Z60 4WD Crew Cab
Mineral Green Metallic w/ Tan Leather Interior
5.3 L FLEX w/AFM, 6A, Cheap-*ss Mods
32 Dump Club Member
Range V8 AFM Eliminator
06-25-2010, 03:25 PM #8Still Loyal to GM after all these years...:shocked:
2006 Impala LT 3.5L
2005 Silverado WT small cab/longbed 4x4 4.3L V6
1999 Grand Am 3.4L in TX w/ our youngest
1993 GMC Jimmy 4.3L 4 door 4x4 'Ole Rusty' - 'SOLD'
1988 S-10 small cab/longbed HT3.4L Crate Engine
1970 Nova 250 I-6, factory 3 sp floor shifter.
1968 Chevelle 'Nomad' Wagon 250 I-6 w/ 3 on da' tree.
06-25-2010, 06:34 PM #9
- Join Date
- Jun 2006
- River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
Bought my 98 Suburban 3 years ago-195,000 miles-and switched it right away to Mobil 1 5W30-recently I switched it to 10w30 because I figured the slightly higher weight might be better for a high mile vehicle. No problems with it-great hy mpg for a huge vehicle.
I read somewhere that 10w30 starts with thicker base oil(probably longer chain molecules??) , and it needs fewer viscosity modifying molecules to pour like a 30 weight (at whatever temp it is measured at)- and will have relatively more pure "lubricating molecules." This sounded plausible , but that doesn't mean it is so.
I live in New Orleans-hot climate-so the oil is never as thick as it is in colder climates.1998 suburban-
06-25-2010, 07:13 PM #10
I run 10w-30 Castrol GTX with Lucas Oil Stabilizer.1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes
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