Use of Synthetic Oil in my 4066R
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Thread: Use of Synthetic Oil in my 4066R

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    Use of Synthetic Oil in my 4066R

    I now have 100 hours on my 4066R tractor which I Purchased new. I did change the oil at around 80 hours and used John Deere Plus 50 10-30 oil as per the recommendation of the dealer that sold me the tractor. However I am a firm believer in synthetic oil’s and use them in all of my vehicles. My main reason for belief in synthetic oil‘s has to do with the wide temperature extremes which we experience up here in the Midwest. Having to use this tractor in -20° temperatures as well as 90+ degree temperatures.

    I’m wondering if others have thoughts or are using synthetic oil in these YanMar engines on the John Deere utility tractors? What type and weight is best? I assume John Deere has their branded synthetic oil?
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    IndianaJim's Avatar
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    Any good diesel rated synthetic will work for you.
    In cold weather you will have easier starts, and in all weather you will see marginally better economy. On a small diesel, youd likely be hard pressed to see it though.

    Deere does sell one, Plus 50 0w40. Its one of the best you can get according to some. I cant remember where I read it, but someone was contemplating running it in their auto diesel, and had some testing done. The conclusion was that it was as good or better than other top rated diesel oils in several categories, additive wise.
    It also offers extended drain intervals over other oils.

    If you dont care for the price, and some dealers like mine wont even stock it because they have to buy so much at a time and dont sell enough, you can use several others that are also excellent oils.
    Mobil 1 Turbo Diesel Truck 5w40, Mobil 1 Delvac 1 5w40, Shell Rotella T 5w40 are all excellent oils, and readily available.
    There are others too that people like, those three are the ones I use or have used.

    Bottom line, yes, you can use synthetic oil in your Yanmar. Synthetic doesnt care how big or how small an engine is.
    It has benefits over conventional oil, though some people like to debate that.
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    I live in MN and have those same temp swings. I use Mobil Delvac 5-40 diesel synthetic in my 2032r. I don't recommend it during breakin, as it lubricates so well your rings and such don't get a chance to get seated properly. It sure makes the cold weather starts easier on the engine. As a plus Mobil has a rebate of 10.00 a gallon right now, at approved retailers. This week Mills Fleet Farm has it on sale for 19.99 and with the rebate it's 10.00 a gallon up to 5 gallons. It's great oil, I use Mobil 1 in all my gas vehicles too. Hope this helps.
    2017 2032R - 220r FEL, 72" mmm,Frontier 2084 blade ,JD 670 tiller, frontier 48" pallet forks, allied 2060 snowblower,JD 513 brush hog, EA 55" grapple,Frontier 2060 box blade, Farmi 351p logging winch
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    jgayman's Avatar
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    Quote Originally Posted by us244963 View Post
    I now have 100 hours on my 4066R tractor which I Purchased new. I did change the oil at around 80 hours and used John Deere Plus 50 10-30 oil as per the recommendation of the dealer that sold me the tractor. However I am a firm believer in synthetic oil’s and use them in all of my vehicles. My main reason for belief in synthetic oil‘s has to do with the wide temperature extremes which we experience up here in the Midwest. Having to use this tractor in -20° temperatures as well as 90+ degree temperatures.

    I’m wondering if others have thoughts or are using synthetic oil in these YanMar engines on the John Deere utility tractors? What type and weight is best? I assume John Deere has their branded synthetic oil?
    For sure! I switched to JD's Plus 50 II 0W-40 full synthetic as soon as I had enough hours on my engine. Here in PA we can have 0F in the winter and 100F in the summer. You can't beat the -40F to +122F temperature range of the 0W-40. It's a good oil for "Fill it and forget it". I figure if it's good to -40F then our lows of 0F should be nothing. It sure helped with the winter cold cranks compared to the 10W-30 I was using during break-in.

    Attached Thumbnails Attached Thumbnails JD_oils.jpg  
    IndianaJim, OxPath, keane and 2 others like this.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    SRG
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    5w40 Mobil 1 Delvac full synthetic here too. I use it in my 1.3L Yanmar diesel (615hrs), and my 1.9L VW diesel (246,000 miles). I'm in the Midwest too, and both get used year round.
    I change it @ 10,000 mile intervals on the VW, and 100hr intervals on the JD. I also primarily use Wix filters on all my equipment.

    What's that JD 0w40 cost?
    Last edited by SRG; 03-05-2019 at 10:27 AM.
    OxPath, PJR832, goat704! and 1 others like this.


    1997 JD 870 (28hp Yanmar), FWA, R1's, 300x loader, 61" bucket, 42" Titan forks, Pat's Easy Change.
    [72" KK box blade, 72" KK landscape rake, 72" Titan pine straw rake, 72" Express Steel snow pusher{XP24}, 60" KK tiller, 60" rotary cutter, middle buster, boom pole]
    2004 JD 797 (29hp Kawasaki) Z-Trak, 72" 7-Iron deck, Mulch blades, Carlisle AT101's.
    Stihl: MS250C/18", FS70R, HS45/18".

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    jgayman's Avatar
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    Quote Originally Posted by SRG View Post
    What's that JD 0w40 cost?
    Local dealer price here is $36.19 / gallon.
    wildbranch2007, PJR832 and JD4044M like this.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    SRG
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    Quote Originally Posted by jgayman View Post
    Local dealer price here is $36.19 / gallon.

    EEK! There's no way I could spend that.
    goat704! and JD4044M like this.


    1997 JD 870 (28hp Yanmar), FWA, R1's, 300x loader, 61" bucket, 42" Titan forks, Pat's Easy Change.
    [72" KK box blade, 72" KK landscape rake, 72" Titan pine straw rake, 72" Express Steel snow pusher{XP24}, 60" KK tiller, 60" rotary cutter, middle buster, boom pole]
    2004 JD 797 (29hp Kawasaki) Z-Trak, 72" 7-Iron deck, Mulch blades, Carlisle AT101's.
    Stihl: MS250C/18", FS70R, HS45/18".

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    jgayman's Avatar
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    Quote Originally Posted by SRG View Post
    EEK! There's no way I could spend that.
    Really? $36.19 for a gallon? What are you paying for the Mobil-1 Delvac 5W-40? Walmart is listing it for $28.16. Pep Boys is $33.

    Use your GTT discount and get it from GFP for $33.65 - free shipping.

    What am I missing?
    PJR832 and JD4044M like this.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    goat704!'s Avatar
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    Quote Originally Posted by jgayman View Post
    Really? $36.19 for a gallon? What are you paying for the Mobil-1 Delvac 5W-40? Walmart is listing it for $28.16. Pep Boys is $33.

    Use your GTT discount and get it from GFP for $33.65 - free shipping.

    What am I missing?
    Hey John, I get mine for 10.00 a gallon but I watch the sales and rebates. I started a thread called oil alert that explains this, take a look.
    I still have leftover from last year, but I'm picking up 5 gallons more at this price.
    2017 2032R - 220r FEL, 72" mmm,Frontier 2084 blade ,JD 670 tiller, frontier 48" pallet forks, allied 2060 snowblower,JD 513 brush hog, EA 55" grapple,Frontier 2060 box blade, Farmi 351p logging winch
    LX 186 - 48" deck, 38" snowblower
    F 510
    GTX 38
    Cub Cadet GTX 1054
    2011 825i Gator

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    jgayman's Avatar
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    Quote Originally Posted by goat704! View Post
    Hey John, I get mine for 10.00 a gallon but I watch the sales and rebates. I started a thread called oil alert that explains this, take a look.
    I still have leftover from last year, but I'm picking up 5 gallons more at this price.
    $10/gal certainly is a killer deal. I don't think you can even buy the standard Dino oil for that. ;-)
    PJR832, goat704! and JD4044M like this.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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