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Thread: 6.2 quarts!

  1. #11
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    My GMC Sierra takes 8 quarts of oil for a change, and not just synthetic - it has to be Synthetic "Dexos" 0W20, I use the Mobil 1 version. The "Dexos" designated oil has special chemicals/cleaners to address concerns unique to direct injected engines, among those are soot and cleaning of the intake valve areas, since no fuel goes in that way via the valves, it is direct injected into the combustion chamber. Excess PCV fumes can lead to problems, so aftermarket companies are promoting "Catch Cans" to capture oil fumes instead of routing it to the intake valves/combustion chamber. If you overfill the oil, it makes the condition much worse, so one thing we can do is run the oil level about a pint low - halfway in the "Etching" on the dip stick, which is still regarded as "The Safe Zone". On down the road, with a high mileage engine that shows a loss of compression, piston ring wear will increase "Huffing", which will send more oil to the intake valves if you don't have a "Catch Can" to capture it. In the old days, these fumes would vent out the oil cap, but the EPA wants them burned.
    Years ago in an old Chevelle I had, I installed Oil Vent Caps in both valve covers, attached huffing hoses that went down to remove those fumes under the car to keep my chrome valve covers clean. Big loping cams loved to huff and puff under load, or at that idle that we all know and love!

  2. #12
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    My laugh was about the .2 quarts. The Tacoma has a set of standard injectors and a set of GDI injectors. The wifes SUV is a GDI engine. Pretty remarkable what they have done with fuel delivery. I can remember early on with the concerns of soot or carbon build up at the intake valve.
    Nothing better than the sound of a large cam engine. Had one or two of those in years past.
    The love for fishing is one of the best gifts you can pass along

  3. #13
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    Yes, another area of concern for soot buildup problems in direct injection is the timing chains, those that have them. GM engineers felt so confident with engine balance, harmonics, and lubrication advancement with the newer synthetics, they felt they had developed "Million Mile Motors". Then surprise, surprise: test mules started having timing chain failures related to soot collections and abrasions thereof creating slack, sag, and pops in the chain creating a myriad of issues, some even "Catastrophic". This lead to the development of Dexos Designated Oil, beginning with GM Oil (By Mobil), and trickling down to other brands. The Dexos Oil cleans the soot so much better, they say, and I personally have found it makes an excellent Gun cleaning oil! Try it! Powder in the barrel does not stand a chance! (Same price as other Mobil 1 Synthetics).

  4. #14
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    I will have to try some on the face of a stainless 357 cylinder. It is almost impossible to remove the carbon staining there.
    The love for fishing is one of the best gifts you can pass along

  5. #15
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    Quote Originally Posted by DockShootinJack View Post
    I will have to try some on the face of a stainless 357 cylinder. It is almost impossible to remove the carbon staining there.
    I believe you will be pleased.
    I bought a pack of 6 little bottles with 2" oil needles on top that is excellent for oiling stuff. I taped a "Dexos" label on a couple of them. I like that with the needles, you can put just a small dab of oil exactly where you need it without making a mess - linkages, door hinges, tools, anything. Some things I oil, then wipe down with a paper towel to clean, and add a last little dab more of oil.
    Works great on locks and reels, too! It cleans really well.

  6. #16
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    Those needle oilers do a great job. They are definitely handy to have around
    The love for fishing is one of the best gifts you can pass along

  7. #17
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    Quote Originally Posted by TheGrandPoohBah View Post
    My GMC Sierra takes 8 quarts of oil for a change, and not just synthetic - it has to be Synthetic "Dexos" 0W20, I use the Mobil 1 version. The "Dexos" designated oil has special chemicals/cleaners to address concerns unique to direct injected engines, among those are soot and cleaning of the intake valve areas, since no fuel goes in that way via the valves, it is direct injected into the combustion chamber. Excess PCV fumes can lead to problems, so aftermarket companies are promoting "Catch Cans" to capture oil fumes instead of routing it to the intake valves/combustion chamber. If you overfill the oil, it makes the condition much worse, so one thing we can do is run the oil level about a pint low - halfway in the "Etching" on the dip stick, which is still regarded as "The Safe Zone". On down the road, with a high mileage engine that shows a loss of compression, piston ring wear will increase "Huffing", which will send more oil to the intake valves if you don't have a "Catch Can" to capture it. In the old days, these fumes would vent out the oil cap, but the EPA wants them burned.
    Years ago in an old Chevelle I had, I installed Oil Vent Caps in both valve covers, attached huffing hoses that went down to remove those fumes under the car to keep my chrome valve covers clean. Big loping cams loved to huff and puff under load, or at that idle that we all know and love!
    That’s so good to know, I’ve wondered about that. I’ve got a 2016 Silverado w/ only 50 k on it and I change the oil every 5k ( mobile 1 0w 20 dexos and gm filter. Would you install a catch can if you were me?


    Sent from my iPhone using Crappie.com Fishing mobile app

  8. #18
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    Quote Originally Posted by ArtyB View Post
    That’s so good to know, I’ve wondered about that. I’ve got a 2016 Silverado w/ only 50 k on it and I change the oil every 5k ( mobile 1 0w 20 dexos and gm filter. Would you install a catch can if you were me?


    Sent from my iPhone using Crappie.com Fishing mobile app
    Hard to say. I have not, but many swear by them. YouTube shows several examples that people have installed and how to do it.
    Personally, I don't think it takes something expensive, but if and when I do, I want it to be not gawdy and in the way, but EFFECTIVE and not really noticeable.
    It can be done - think of it like a small Water Separator, that you can easily monitor and empty from time to time.
    Also remember that Dexos Oil serves double duty, both as a lube, and part of the engine cooling system. The thin viscosity encourages it to vaporize, thus more fumes...
    When I decide to do it, it will be interesting to see how much oil gets collected in the "Catch Can". Only then will I know if it was needed, or just a waste of time.
    I will post results if and when I get around to it. Currently, I am in the middle of a lot going on...

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