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Oil Grade Recommendations?


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#1 T o Double D

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Posted 16 January 2008 - 01:21 AM

getin my second oil change this weekend so I'm about to order a case of royal purple tranny fluid and motor oil. I got 6000 miles on a 4.8l v8 sierra. wich grade oil should I run with?? wich do yall use? I ran 20w50 on my 92 ford but it was old. thanks for the help.
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#2 Supertruck

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Posted 16 January 2008 - 02:08 AM

Use whatever brand you want but make sure you use the viscosity and quality required by your owner's manual, or you may void your warranty.
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#3 iminaquagmire

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Posted 16 January 2008 - 02:19 AM

5w30. Says it right on the filler neck.
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#4 T o Double D

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Posted 16 January 2008 - 02:35 AM

Use whatever brand you want but make sure you use the viscosity and quality required by your owner's manual, or you may void your warranty.



doesn't the number have to do with the thinkness of the oil? sould I be running something a little thinker since its winter? what is ur grade marko?
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#5 Z71xSilverado

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Posted 16 January 2008 - 06:34 AM

Id run 5-30 or 0-30 for faster winter warm ups and less CSK

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#6 C & A s Dad

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Posted 16 January 2008 - 11:19 AM

I researched using different weights for winter and summer driving and ended up talking to Amsoil end the end. They recommended the mfg's weight recommendation which in my case is 5W 30. I am sure yours is the same. I do not have cold temps necessarily but wondered if I would benefit from a 10W 30 in the hot summer while towing. After looking into with Amsoil, I discovered at the time, their 5W30 out spec'd and out performed their 10W 30.

I would suggest you use what GM recommneds and I am sure that will be 5W 30.
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#7 xsports33

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Posted 16 January 2008 - 12:37 PM

5w30 for the motor oil and Dex VI for your transmission
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#8 iminaquagmire

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Posted 16 January 2008 - 12:43 PM

Yeah should have mentioned the ATF. DO NOT change that. RP does not offer an equivalent to DEX VI and as far as I know, nobody else does either. Dexron VI is actually far superior to others anyway from what I've seen.
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#9 T o Double D

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Posted 16 January 2008 - 12:54 PM

Yeah should have mentioned the ATF. DO NOT change that. RP does not offer an equivalent to DEX VI and as far as I know, nobody else does either. Dexron VI is actually far superior to others anyway from what I've seen.


wow thanks for the help! I just went to advanced auto parts (i think its called) and pick up 5 quarts of RP 5w-30 and a K&A filter. 7.20$ a quart. i hope i can tell the diffrance. ;) luckly they dident have the RP tranny i dident read your reply till i got back. good looking out thanks! :D :crackup: :crackup: :crackup: :thumbs: :thumbs: :thumbs:
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2007 GMC Sierra Crew-Cab SL 4.8l V8 GMT900. 20" Chrome Fierro Titan Rims, DIC Upgrade, Single In Dual Out Flowmaster 40 Siers, With Polished Stainless Tips, GMPP Air Intake, 5% Tint On Rear Windows, 25% On Front Two, Raptor 4" Oval Side Steps, Clifford 50.5X Remote Start/Security System, Genuine GM Painted Mirror Covers, Genuine GMC Seat Covers, Genuine GM Chrome Door Handles, 2" Rough Country Leveling Kit, Interior LED Doam Lights & LED Licence Plat Lights, Carriage Works Billet Grill, And Royal Purple Synthetic Oils 5W30. signature courtesy of Daddy

#10 D&SYukonDenali

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Posted 16 January 2008 - 01:02 PM

Is it OK to run full synethic oil in the 6.2 liter engine?

#11 Draenor

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Posted 16 January 2008 - 01:06 PM

Is it OK to run full synethic oil in the 6.2 liter engine?

Yup


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