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WHAT IS THE BEST OIL / TYPE TO USE IN THE 6.2

Discussion in '1982-Present GM Diesel' started by josephn, May 21, 2001.

  1. josephn

    josephn 1/2 ton status

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    What is the best oil/type to use in my 6.2.
    Like 10W/30, 10W/40..............


    1982 6.2L Diesel K5 Blazer, TH700, 31 inch tires.
    Fire ALWAYS makes it better.<P ID="edit"><FONT SIZE=-1>Edited by JOSEPHN on 05/21/01 09:55 AM (server time).</FONT></P>
     
  2. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    You should always use 15w40 in a 6.2. Oil change frequencies are different then a gasser, too. I change my oil every 1600-2000 miles, depending on how hard the motor has worked.

    A lot of guys here don't like Pennzoil, but a dude called "Oilman" once posted a report on the longevity of different oils and the Pennzoil 15w40 came out on top. I tried it and it seemed to take longer for the oil to get really black, so that's what i've used for the last year and a half. Don't use cheap oil- 20:1 compression can play havoc with the internals of your motor if it's not properly protected............



    <font color=red>PHOTO ALBUM-</font color=red> <A target="_blank" HREF=http://albums.photopoint.com/j/AlbumList?u=1289798>http://albums.photopoint.com/j/AlbumList?u=1289798</A>.......<font color=blue>TRUCK & HIKING PICS</font color=blue>
     
  3. josephn

    josephn 1/2 ton status

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    Thanks I will use 15w40 then.
    Thanks again.

    1982 6.2L Diesel K5 Blazer, TH700, 31 inch tires.
    Fire ALWAYS makes it better.
     
  4. JORGE

    JORGE 1/2 ton status

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    I don,t know wath kind of oil have you in USA.I use ESSo 15w40 DIESEL.I,ve seen a less oil consumption with it,in compare with other oils.Change the oil filter in all the oil changes.
     
  5. surg82k5

    surg82k5 1/2 ton status

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    I would have to dissagree, I have always used Havoline 30HD and my 6.2 runs great. I really don't think you need to change the oil that often either. mine goes between, 4 and 6 thousand before an oil change and it has 113, 000 miles and is as strong as ever, well before my wreck, but it will be back soon and with the same good 'ol 30 HD.
    sergio
     
  6. BlueBlazer

    BlueBlazer 1/2 ton status

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    Chevron Delo 400 SAE 30 in the summer and 15-40 in the winter. If the temps are consistently above freezing then 30 weight only should be used.

    '82 K5 6.2 Diesel, sm 465 np 205, 35" muds
     
  7. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    I use Rotella 15w-40. Never had a problem with it.


    SK-15
    J**P...it's whats for dinner!
    <A target="_blank" HREF=http://SK-15.coloradok5.com>http://SK-15.coloradok5.com</A>
    Roads? Where we're going, we don't need any roads!
     
  8. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Seeing that you're in Texas, Surg, I can see how you could get away with running 30 weight all the time. However, the majority of us probably see colder weather every so often, and 15w40 is the only way to go in such environments. Keep in mind that 15w40 offers better protection at start-up too, regardless of the outside temperature.

    Secondly, unless you use your Blazer for running to the grocery store and driving to work, your oil change frequencies are severely unhealthy for your motor. the following is directly from my 83 GMC owner's manual(with additions by me):

    -Frequent long runs at high speed and high ambient temperature(like the heat of a summer day in Texas)
    -Operating in dusty areas(like any place off-road)
    -Towing a trailer

    CHANGE ENGINE OIL AND FILTER EVERY 2500 MILES OR 3 MONTHS, WHICHEVER COMES FIRST

    -Operating on a daily basis, as a general rule, for several miles and when NONE of the above apply:

    CHANGE ENGINE OIL AND FILTER EVERY 5,000 MILES OR 12 MONTHS, WHICHEVER COMES FIRST

    The way I read it, even if you're just using your truck as a cruising rig, 6000 miles is WAY to long between oil changes. I mainly use my 6.2 for towing through the Canadian Rockies. Maybe 2000 mile oil change intervals is overdoing it, but the cost of an oil filter and 6 and a half litres of oil is a lot cheaper than a rebuild...................



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  9. NewK5Guy

    NewK5Guy 1/2 ton status

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    Whatever oil you use, make sure it's DIESEL oil. There is a difference and it can cost you dearly if you're not careful. I picked up 3 gallon jugs of Shell Rotella T 15w40(standerd weight for the 6.2) for Advance for about $1.95 each. The price and availibility aren't any different, just the chemical makeup.
     
  10. 6_2liter

    6_2liter Registered Member

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    i use RotellaT 15w40. i've heard it's the best for a 6.2

    jesse
     
  11. LittlePig

    LittlePig 1/2 ton status

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    How about the stuff they sell at the truckstops for the BIG diesels? Would that in any way affect the smaller engine?

    Email: xiaozhu@my-deja.com
    ICQ: 84108805
     
  12. RLBstein

    RLBstein 1/2 ton status

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    Rotella is the stuff they use in big diesels. At least thats what my brother-in-law uses, and he's been driving a semi for 15 years. I use it in my 6.2L

    85 Blazer on an 82 chassis, 6.2L Diesel, ORD flip, 35's with no cutting on a 4" lift.
     
  13. Oilman

    Oilman Newbie

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    Wow I guess my ears were buzzing. I saw a post here about Oilman and the best oil post of about a year ago. I'm oilman and yes I'd be glad to answer any questions that you might have about the quality of oils. or anything about oils for that matter. I'm a Certified Lubrication Specialist by the STLE (Society of Trobologists and Lubrication Engineers) and I've worked in the oil industry for over 22 years. My e-mail is dinwiddiek@earthlink.net

    Sincerely,
    Kevin
     
  14. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    Could you just post the oil results here? or maybe a link? [​IMG]


    SK-15
    J**P...it's whats for dinner!
    Roads? Where we're going, we don't need any roads!
     
  15. Oilman

    Oilman Newbie

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    There is a new list of oils tested, so the link would be outdated. The new list has synthetic and petro oils on it. If you e-mail me I'd be glad to send it to you. The tests were the Falex wear test combined with the TFOUT oxidation test. The best oil is one that did well in both areas not just one.

    Sincerely,
    Kevin Dinwiddie
    dinwiddiek@earthlink.net


    &lt;P ID="edit"&gt;&lt;FONT class="small"&gt;&lt;EM&gt;Edited by Oilman on 08/07/01 12:44 AM.&lt;/EM&gt;&lt;/FONT&gt;&lt;/P&gt;
     
  16. HighSierra

    HighSierra Registered Member

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    My truck had a 6.2 in it but, by the time I goten it had a 350 shoved in it. Any way I have been around big trucks my whole life so I know a thing or two about diesels. From what I have seen and heard Rotella and Drydean(sp) are the best oil for diesels. As said before make sure you use diesel oil.

    If it aint broke, Keep fixing it till it is.
     

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