Ran my oil too long now low pressure
5

Asked by TDBroke Feb 18, 2020 at 10:53 AM about the 2008 GMC Sierra 1500 SLE1 Crew Cab

Question type: Maintenance & Repair

Generally I'm very methodical about maintaining my 2008 GMC Sierra 5.3L
but I changed to Mobil 1 synthetic and was told I could get a little more
mileage between changes. So I did. And that was a mistake. I checked the
oil and it was extremely low. Low enough that I had to add 2 quarts. Now my
idle pressure is about 20 and my running pressure is about 38 or 39 when
it's normally around 40 to 41. I changed my sending unit about 8 months
ago. I have a Wix filter on it now (just changed the oil) so everything is in
line. But I'm getting 41 at cold start idle and then it will drop down to 20 at
idle after hot and 38 or 39 when running at 65 mph. Did I mess this up
somehow? What are my next options?

4 Answers

F_O_R answered 4 years ago

Just because you can run synthetic longer does not mean you don't need to check the oil level. A this point all you can do is keep running the engine for as long as it will run.

Mark helpful
5

TDBroke answered 4 years ago

Strangely enough today I'm getting the correct pressures. I don't quite understand what's happening with this thing.

Mark helpful

Your Answer:

Related Questions

  • Ran my oil too long now low pressure 4 Answers

    Generally I'm very methodical about maintaining my 2008 GMC Sierra 5.3L but I changed to Mobil 1 synthetic and was told I could get a little more mileage between changes. So I did. And that was a mi...

    2008 GMC Sierra 1500 SLE1 Crew Cab

    -

    Maintenance & Repair

  • 2000 GMC Sierra low oil pressure 2 Answers

    Ok here it goes I have a 2000 GMC Sierra that I was hauling a large trailer with and the oil pressure dropped and ticking noise started. Changed the oil and put in a new pressure switch. Was told ...

    2000 GMC Sierra 1500 SLT 4WD Extended Cab LB

    -

    Maintenance & Repair

  • 2010 GMC Sierra crew cab 4x4 Z71 - low oil pressure 4 Answers

    Is it normal for this sierra to run 39% oil pressure on the highway on cruise control and at times 20% percent on idle in the city? Doesn't that seem too low? I took it to the dealership and they sa...

    2010 GMC Sierra 1500 SLE Crew Cab 4WD

    -

    Maintenance & Repair

  • Does low oil pressure cause fuel to burn lean? 1 Answer

    I had to replace my motor a year ago. I got a used engine. From the beginning the check engine lights comes on after about 40 miles. The oil pressure when hot idles at 10 ksi, when running on 8 cyli...

    2008 GMC Sierra 1500 SLT Crew Cab 4WD

    -

    Maintenance & Repair

  • Oil pressure 1 Answer

    Coming home oil pressure went from 40psi to 80psi. But when I turn key over it goes to 60psi. Then I start truck it goes to 80psi. What is my problem?

    2008 GMC Sierra 1500 SLE1 Ext. Cab

    -

    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 7,037 nationwide Sierra 1500 listings starting at $3,950.

Postal Code:

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,810
  • #2
    dragonflyoffshore
    Reputation
    11,750
  • #3
    John Saffrahn
    Reputation
    11,690
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
217 Great Deals out of 5,899 listings starting at $2,975
Used Ford F-150
323 Great Deals out of 15,226 listings starting at $3,295
Used GMC Sierra 2500HD
19 Great Deals out of 1,645 listings starting at $12,900
Used Toyota Tundra
42 Great Deals out of 1,161 listings starting at $9,395
Used Chevrolet Silverado 2500HD
25 Great Deals out of 1,239 listings starting at $9,990
Used GMC Yukon
9 Great Deals out of 781 listings starting at $1,225
Used Toyota Tacoma
46 Great Deals out of 1,036 listings starting at $8,708
Used Dodge RAM 1500
7 Great Deals out of 68 listings starting at $1,995
Used Ford F-250 Super Duty
26 Great Deals out of 1,179 listings starting at $8,995
Used Chevrolet Tahoe
15 Great Deals out of 822 listings starting at $5,995
Used GMC Canyon
16 Great Deals out of 1,316 listings starting at $7,495
Used Dodge Charger
36 Great Deals out of 626 listings starting at $4,888

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.