Jump to content

Oil Pressure 6.0

gmcleer

Recommended Posts

SMiller Senior Enthusiast

SMiller

Posted
Posted

No but it's a good gauge of health is all and I am curious for my own doing. When I next change oil in my 17 and my miled out 05 I am going to compare them... pretty sure the 05 will have more pressure across the board than the 17 does. Why? Who knows.. If they are all low like mine it's for a reason... something has more clearance than it used too.

I drove both my LQ9 (6.0) and L96 (newer 6.0) today and can assure you the older based LS motors run more oil pressure.

 

Oil psi cost power, power cost mileage, manufacturers are doing everything they can to get mileage, the newer ecotech GM engines even run a dual displacement oil pump that runs low psi under 3,500rpm and high psi over.

 

My old big block engines would peg the needle and ran a ton of psi, doesn't mean they lasted longer.

 

Runs quality oil and filter and don't worry about it.

  • Replies 31
  • Created
  • Last Reply
SierraHD17 Senior Enthusiast

SierraHD17

Posted
Posted

I drove both my LQ9 (6.0) and L96 (newer 6.0) today and can assure you the older based LS motors run more oil pressure.

 

Oil psi cost power, power cost mileage, manufacturers are doing everything they can to get mileage, the newer ecotech GM engines even run a dual displacement oil pump that runs low psi under 3,500rpm and high psi over.

 

My old big block engines would peg the needle and ran a ton of psi, doesn't mean they lasted longer.

 

Runs quality oil and filter and don't worry about it.

 

That's all fine and dandy but I build these things as a pretty serious hobby and not a hell of a lot changed between generations.... hence why are some so low and some not. All things equal the engines should run the same pressure up to when the relief valve above the oil filter pops..... but this new ones idle is pathetically low.... GM hasn't really changed much in the way of oil pumps and doesn't have a lower pressure pump spring so the pressure is being lost somewhere. Maybe the secondary relief is leaking all the time.... who knows. The variable one in the newer trucks is simple..... you have a solenoid controlled relief that stays open up to 3700 rpm and then they will peg the gauge. I am sure I will find out where it's loss is when it piles up lol.

Archived

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

Go to topic listing

  • Latest Articles

  • Posts

    • Grumpy Bear
      Sugar Bears 2015 GMC Terrain SLE-2 2.4 AWD

      By Grumpy Bear · Posted

      287,500 Mile Service   8/13/2026   Reset Fuel Trims   Since the work done in the previous post there was a good improvement in response in all areas except right after a fill up where the LTFT would go -20%+ for about four miles while the STFT was near neutral. Before the work they both went very negative for a few miles after a fill up but act normal thereafter.    We did a systems check of the vapor recovery system for functionality and ability to hold a vacuum. That checked out fine. But this doesn't mean the charcoal canister is dead in the water. Testing that is next up. For now the reset of the fuel trims.    I intentionally shorted the fill exactly two gallons to eliminate any chance of filling the canister. On start up the trims were behaving normally until I got up and rolling where the LTFT went -10 / -11%% but the short was + 2 to 0%. Within a mile the the STFT offset the LTFT and by 2 miles they were neutral. HUGE improvement but still not hunky-dory.    I'll watch them for a few days. Perhaps another tank where I will fill completely to 'first click' and compare. Meanwhile on the hunt for a new canister and I'll toss another purge value at it for good measure. Pending the outcome of the canister test that is. Progress of any kind is welcome.    Fuel economy improvement with bringing hole #3 back to the living was a noticeable bump to the positive. Even on the few miles I drove after the refill I already see another bump up by the trims reset.     She's purring like a kitten with a warm bowl of milk.    BTW, adding 50 rpm to the idle took the majority of the negative timing out on cold start up and leaned the cold idle. No longer burbles in the cat. What a dumb way to heat a cat.      
    • OnTheReel
      Post your UOA, (used oil analysis) here

      By OnTheReel · Posted

      Yeah, shame I can’t really get that filter easily anymore. Running a PureOne. Your fave!    TAN would be neat to see. Confirmation I ran it too long probably. 🤣
    • superdave160
      Roll up bed cover experiences

      By superdave160 · Posted

      My son and I both bought new trucks in 2017. Both of us immediately put Truck Covers USA American Roll Covers on our trucks. My son still has his truck and it never sees the inside of a garage. We live in Alabama, so not much snow. My truck was my daily driver and was in the garage when I wasn't driving it or at work. No issues with either cover even after almost 9 years. About a year ago I sold my truck to my brother and bought a 2025 Silverado 2500. The second thing that I put on that truck was a new Truck Covers USA cover. They are very well made and have a very positive locking system. I looked at a Retrax and my concern was the way that the cover locked to the rail. BTW, the first thing I put on the new truck was step bars. Those new trucks are high!
    • superdave160
      Gasser Subforum Has Been Quiet - - So, Regenerative Braking and Using L10

      By superdave160 · Posted

      The Allison 10 speed torque converter doesn't "lock up" like the previous transmissions. It has 4 operational modes; open, slip, transition from open to slip; transition from slip to open. I have an Edge CTS3 monitor and I monitor transmission torque converter slip. Step on the gas and you get a little slip. Take your foot off the gas and you get a little negative slip. I have not found a way to display the torque converter mode beyond that. My Edge CTS3 also displays something that our trucks should already display, the current gear. I also monitor throttle body position and engine load. If I see the engine load getting too high, I'll manually drop a gear.
    • Grumpy Bear
      Post your UOA, (used oil analysis) here

      By Grumpy Bear · Posted

      Nice result. Your filter is working well  I'd have like to have seen the acid number for this sample. Curious type that I am. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...