Jump to content

Synthetic Oil

RedGMC05

Recommended Posts

JimsZR2 Enthusiast

JimsZR2

Posted
Posted
Could you use synthetic oil for the 2005 GMC sierra 1500 motors? I was just curious can anyone help me ?

 

 

 

Just run pure regular 5W30 or a run a BLEND

 

There is no need to run a full synthetic because the flashpoint of the oil will never be hit.

  • 1 month later...
  • 2 weeks later...
GMCStepSide Enthusiast

GMCStepSide

Posted
Posted

I live in Alaska...our winters aren't as severe as they were when I was a kid but we still see alot of subzero mornings. I have always used synthetic and have it in my 2005 GMC 1500, and wouldn't consider doing it any other way. Startup on the cold mornings makes it a necessity. The local GM dealers all offer the synthetic and I know my local service manager uses it in his personal truck.

 

Personally, I believe it comes down to how much strain and wear you're willing to put on the engine. For me, I've used Mobil 1 for years and have had trucks/cars that easily went 175,000 plus without any problems. I'm not a salesman nor do I own stock in a oil company, I just know what I've experienced and for cold climates there is nothing better than synthetic.

  • 2 weeks later...
  • 4 weeks later...
juicy Enthusiast

juicy

Posted
Posted
I heard synthetics will exagerate an oil leak, is this true, Im soon to do my 1st oil change, All my previous vehicles Ive use regular pennzoil 5/30, thanks

 

 

 

 

 

its true if you decide to swap from dino to syn on a higher milage engine...

Tor Diesel Enthusiast

Tor Diesel

Posted
Posted

Regular oils can create a buildup around seals and gaskets. Changing to synthetic will break down those deposits. If you already have a leak then the leak will exagerate due to the already mentioned reason and synthetic oil's better flow characteristics. For your 2005 there should be absolutely no reason not to switch. Synthetic lasts longer, protects better, and can even get you slightly better gas mileage. Its stock on Corvette, Porsche, Mercedes, etc.

 

FYI - I switched to synthetic on my 4Runner at 140,000 miles and have had no leaks and now burn less oil than before (1 qt per 10000 miles vs 1 qt every 5000 miles)

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
I heard synthetics will exagerate an oil leak, is this true, Im soon to do my 1st oil change, All my previous vehicles Ive use regular pennzoil 5/30, thanks

 

 

 

 

 

its true if you decide to swap from dino to syn on a higher milage engine...

 

 

 

 

 

 

Uh no...

 

I went to M1 at 73K on my 97. No leakers here.

  • 4 weeks later...

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,840
    Total Members
    8,960
    Most Online
    appletrav
    Newest Member
    appletrav
    Joined

  • Who's Online   2 Members, 0 Anonymous, 408 Guests (See full list)

  • Latest Articles

  • Posts

    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉
    • Coastie05
      give me some tips to make my truck look better

      By Coastie05 · Posted

      Go back to OEM wheels. 
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Probably not their first rodeo, so it should go as planned most likely.  Typically the service manager or tech doing the swap will put some seat time to shake it down after they get it all put back together.  We usually put 50-100mi before we hand them back so if something happens, its not after you get it.  A coolant leaks, oil leaks, a ground left off or loose, vibration, etc.     The new engines so far have been good?  There's been a couple that have popped out there again (the replacement engine) but most have been okay.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...