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What Weight Oil should I use?

Discussion in 'Chevy Trucks' started by Wrecker, Dec 29, 2005.

  1. Wrecker

    Wrecker Junior Member
    Messages: 15

    I have a 89 K2500 with a 350 with about 90,000 miles on it. I live in Upstate NY and use my truck for plowing a dozen driveways and drive 30 miles a day for work. What weight Oil should I use. I don't baby my truck or abuse it. I use it for a Truck..... I'm currently using 10w30.... Someone I know suggested 20w40... Just want to take care of my truck.

  2. murphyslaw

    murphyslaw Senior Member
    Messages: 443

    in the winter i would use 5=30 and in the summer 10-40(thats what i use in my 78chev and the 85dodge and the 2000 dodge. seems to work good. and i use oil pan heaters.
  3. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    I would use 10W30 in the summer and 5W30 in the winter.....I would also recomend only using an AC PF52 . This filter will keep from having a dry start up.
  4. Jpocket

    Jpocket Senior Member
    Messages: 302

    10w 30 is perfect for year round conditions, I wouldn't go any thinner than thats because your motor has 90,000 on it, the tolerances aren't as tight.

    IN the summer switch to a 10w 40. I think the only thing you could benefit from is a synthetic, so you won't have to change it that often. Otherwise keep that 10w 30 in there and change every 3,000, I use the FRAM tough gaurd oil filters, w/antidrain back valve.
  5. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    I run 10W30 year around in southern Ohio. I figure with him being in a colder climate than me he would want 5w30 for winter. Yes I use synthetic, but didn't want to start a big fight over it here. I used to run Fram filters, was have lifter knock on start up on my 98 k3500 with 165000 miles.Talked to a fleet mechanic about it who showed me the difference between the filters(he cut open old ones). The Fram only has a relief valve in it, nothing to keep the oil from draining back into the sump(4x4 filters sit on their side, 2wd sit almost upright). Changing to the PF-52 has eliminated my lifter noise on start up...
  6. Caleb55

    Caleb55 Member
    Messages: 44

    10w-30 in all my 350 chevy's. Use to go with the pf-52, now I use a Wix filter, since I have any easier time getting this filter, still same good quality.