1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

What oil do u use???

Discussion in 'Chevy Trucks' started by chevy$men, Dec 20, 2011.

  1. chevy$men

    chevy$men Senior Member
    Messages: 119

    I want to know what oil is the best?? what do you use? i was told to use heavy oil since we work these trucks i know people use 15-40 diesel oil in there gas truck and got 260,000 and still running like new $$$ or should i go with 5-30 and what brand is the best ???THANK IN ADVANCE
  2. elecblu

    elecblu Member
    Messages: 79

    I have (2) '98 chevy k2500. One at 285,000 and the other at 245,000. I run Valvoline 5w-30, at about a 3500 mile interval. Both have excellent oil pressure, so i see no reason to change. I have been using Valvoline for several years. I have not been convinced to start using synthetic oils and going the 10,000 mile oil changes.
  3. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    to thick in newer engines eat's horsepower and fuel mileage.
  4. MarkEagleUSA

    MarkEagleUSA Senior Member
    Messages: 335

    I've been using Mobil1 in all my vehicles for years. Depending on usage I usually go 5000-7500 miles between changes and have never had a problem. For me the key is to check the oil frequently. As soon as it starts getting black, I change it regardless of the mileage.
  5. elecblu

    elecblu Member
    Messages: 79

    Are you talking about synthetic being to thick? Or 5W-30 being to thick?
  6. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,390

    15w-40 is to thick in the new model trucks
  7. icudoucme

    icudoucme Senior Member
    Messages: 367

    I like castrol synthetic 5w30. I have 125,000miles on my 04 2500hd 6.0.
  8. bow2no1

    bow2no1 Senior Member
    Messages: 338

    i have used mobil in everything i have owned!

    i heard it's best to stay with the same brand of oil as long as you have truck.
    thats what i do, i have never changed one of my own engines!
  9. M & MD Lawn

    M & MD Lawn Senior Member
    Messages: 361

    I use to run 5w-30 in the summer and 10w-30 in the winter, but now I just run 5w all year round.. mine has 218,000 although It was rebuilt at 193...I change mine every 3000 regardless
  10. PLOWMAN45

    PLOWMAN45 2000 Club Member
    Messages: 2,951

    Well i just bought a brand new truck so I will be using mobil 1 or other sythenic blend
  11. jklawn&Plow

    jklawn&Plow Senior Member
    Messages: 469

    Oil gets thick when it gets cold. I would never use anything but 5W30 in the winter. My compressor won't even start in the winter with 30W oil in it. Imagine trying to pump thick molasses through some small openings in the engine. Thick heavy weight oil is not recommended for a reason. Maybe if you keep it in a 90 degree garage and never shut it off outside. I'd still only switch up to 10W40 then. I use Pennzoil Platinum Synthetic or Mobil1.

    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,362

    Why did you run 10-30 in the winter and 5-30 in the summer? Kinda backwards. To the OP I use Amsoil keep a drum of 15w-40 and 10w-40 on hand, everything diesel gets 15w-40 and everything with spark plugs gets 10w-40
  13. M & MD Lawn

    M & MD Lawn Senior Member
    Messages: 361

    OH DAMN I typed that wrong, I meant 10w in the summer and 5w in the winter, good catch I dont switch anymore since its been rebuilt
  14. chevyman51

    chevyman51 Senior Member
    Messages: 537

    I run valvolien or how ever you spell it 5w30 in my 95 1500 and its got 187000 miles on it and it runs great.
  15. mayhem

    mayhem PlowSite.com Addict
    from Peru MA
    Messages: 1,016

    Mobil1 5w-30 year round in my 6.0. No issues at 147,000.
  16. Stik208

    Stik208 PlowSite.com Addict
    Messages: 1,319

    Mobil 1 High Mileage, 5k intervals.
  17. Gear_Head

    Gear_Head Senior Member
    from IL
    Messages: 245

    Mobil 1 5W30. I and my father have ran Mobil 1 in everything for the last 20 years with fantastic results. I change at 5000 miles.

    I bought my truck with 16000 on the odometer and the previous owner had ran 10W30. I initially agreed with this and did the same, using the old school way of thinking that "thicker" is better. After lots of reading and learning, I realized the previous owner and I were boneheads.

    I switched back to 5W30 as the truck manual says to do and my oil pressure went up slightly to my surprise. My point, run what the truck says you are suppose to for weight, they know what they are doing. Pick a quality oil and never look back,
  18. chevboy167

    chevboy167 Member
    Messages: 96

    ive been running MOBIL 1, 10w-30 since i got my truck new in '99. perfect oil pressure & no problems. change every 3k. a good quality filter helps also. is up to what u prefer and trust.
  19. Bigrd1

    Bigrd1 Senior Member
    Messages: 136

    I run AMSOIL OW-30 in my truck and never had any problems with it.110,000 miles. I used to run Mobil 1 but it breaks down too fast and gets expensive. AMSOIL is more expensive than Mobil 1 but I do oil changes half as often as I used to. Instead of changing my oil every 4000 miles now I do it every 10,000 changing the filter and adding a quart at 3000 and 7500. In the long run I save money and my truck runs a little cooler too.
  20. mnglocker

    mnglocker Senior Member
    Messages: 923

    I run Rotella T6 5w40 syn in my Dakota R/T. The half ton dodge (5.9 v8 gasser with 95k on the short block) get's a 10w30 Rotella T3 and 1.5 quarts of Mobil1 10w30. ( It holds 5.5qts because I run the larger 41515 napa filter) My 2500 CTD Dodge get's Rotella T3 15w40 year round and stays plugged in in the winter. I'm thinking about trying the T5 Rotella synblend 10w40 next time. But the 180k mile seals on it leak full syn 5w40 like no other.

    IMHO Diesel rated oils CJ-4 are going to be better than the bulk of off the shelf conventional or synthetic SM/SN. The Diesel rated oils break down at higher temps and have more corrosion inhibitors.
    Last edited: Dec 21, 2011