Oil Quantity and type for Chevy 350

Discussion in 'Trucks and Trailers' started by scott's turf, Jun 13, 2006.

  1. scott's turf

    scott's turf LawnSite Senior Member
    from NH
    Messages: 949

    Hi guys,

    I bought a 2002 W3500 (cab over style) with a 5.7L (350) engine and it is due for an oil change again. I had done one last fall but can't remember the number of quarts or the type of oil chevy recomends. Any help would be great.

  2. Brendan Smith

    Brendan Smith LawnSite Bronze Member
    Messages: 1,195

    what does the owner's manual suggest?
    not being a smarta$$, just wondering
  3. carcrz

    carcrz LawnSite Silver Member
    Messages: 2,085

    5 quarts. Weight depends on weather conditions. I think they recommend 5w30, but I've always ran 10w30 in mine. I've had 3 different trucks w/ the 350's in them. Now I've gone diesel :weightlifter: .
  4. FearThisDeere

    FearThisDeere LawnSite Bronze Member
    Messages: 1,154

    Is there really a big differnce between 10w30 and 5w30? I run 10w30 in my 305 and the manual suggests 5w30.
  5. carcrz

    carcrz LawnSite Silver Member
    Messages: 2,085

    I really can't remember. I think it was something like the 10W30 was thicker so it sticks better during hot weather protecting it better. Not positive on that though.
  6. Audrey

    Audrey LawnSite Senior Member
    from Pa.
    Messages: 570

    Yep, 5 quarts. 9/16 box end for the plug.

    5 Weight oil is thinner than 10 Weight. It will help you in cold starts and/or cold weather by flowing more freely to where it is needed. The thinner oil also helps manufacturers meet the demands of minimum mileage set upon them by the government. Less friction/resistance = more HP and efficiency.

    Also, as the clearances of newer engines get tighter, thinner oil is needed to reach all areas effectively. In hot weather, you may get away with 10W oil. However, in colder climates or wintertime, it will eventually cause unwanted effects due to slight starvation as a result of thicker viscosity.

    Heck, we used to run 10-40 all the time in the 70's and 80's. Two quarts or so of 20W-50 can help with a slight bearing knock..
    In a 90's 5.7 with some miles on it, I'll run 10-30 in the summer, 5-30 in the winter.
    I have a 2004 Ford 4.6 liter. It takes 5W-20. Might as well pi$$ in it, it's so thin. But that's what the specs call for...

  7. scott's turf

    scott's turf LawnSite Senior Member
    from NH
    Messages: 949

    Thanks everyone. If I had an owner's manual I wouldn't be asking the question...grrrrrrrrrrrr. I'll be changing the oil this weekend. Funny how that big engine only needs 5 quarts when everything else seems to take at least 6, even my wife's volvo.
  8. Audrey

    Audrey LawnSite Senior Member
    from Pa.
    Messages: 570

    It is funny. The Ford I mentioned takes 6 quarts also. IIRC, I did a VW Passat a few times a couple of years back and that took 6.

    Can you go online to a more type-specific forum and find your exact info? By that I mean a truck only site. Is it possible to reorder a manual from factory? Maybe a local car/truck show which has vendors?

    Carlisle is near here, and several times per year thay have large car shows that draw nationaly. Vendors from everywhere too. Anything like that near you where you could pick up a manual?

  9. J&R Landscaping

    J&R Landscaping LawnSite Fanatic
    Messages: 5,095

    I run Shell ROTELA T 15W40 with a bottle of lucas oil stabilizer in it throughout the year. I've talked to my mechanic and he has nothing bad to say about it!

    If its going to be working a lot, the extra protection won't hurt!!
  10. lawncuttinfoo

    lawncuttinfoo LawnSite Bronze Member
    Messages: 1,013

    my chevy 1500 says 5W30 on the oil cap. I put 10W30 in it last time and my engine has been running hot since. I don't know it it is the cause or not.

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