Can I use 15W40 diesel oil in a gas engine.
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 19
Like Tree10Likes

Thread: Can I use 15W40 diesel oil in a gas engine.

  1. Top | #1

    Join Date
    Dec 2012
    Last Online
    09-10-2019 @ 11:40 AM
    Location
    Belton, South Carolina
    Posts
    1,646
    Thanks
    499
    Thanked 130 Times in 103 Posts

    Can I use 15W40 diesel oil in a gas engine.

    My Dodge Ram 1500 has 215,000 miles on the engine. These days is sees very little use, maybe 2,000 miles a year if that. It does burn oil but not too bad. I recently put in a quart of Shell Rotella 15W40 diesel oil & noticed it burns less over 500 miles use. I'm thinking of using 15W40 on my next oil change with also a quart or so of Lucas oil mixed in. I don't think I will do any harm on an engine with 215 K on it. The truck is currently used for lumber & material pick up at the local lumber yard only five miles away & sometimes it make a 30 mile round trip into town. Average monthly use is less than 200 miles a month. It's an eight cylinder engine & I think the original oil spec is for 5W20(?). Thanks for the advice / opinion.

  2. The Following User Says Thank You to Maddog For This Useful Post:

    toby.jutras (07-07-2017)

  3. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  4. Top | #2

    Join Date
    Sep 2014
    Last Online
    Today @ 09:51 AM
    Location
    West Michigan
    Posts
    1,893
    Thanks
    94
    Thanked 218 Times in 174 Posts
    Given your location and the miles on the engine I wouldn't worry about using that oil- and if it stops consumption/burning all the better.

    You'll not experience any cold starts down south so you won't be working the engine on super thick cold oil and there are lots of folks who subscribe to the notion of going up a thickness grade in a motor to try and stop oil use out there.

    Bottom line, at that mileage in your truck-do as you think is best. I don't think you'll cause any harm.

    Added: original spec was likely 10w or 5w30, I had an '01 with the 5.9l.
    Last edited by balrog006; 07-04-2017 at 10:39 AM.
    Herminator likes this.
    2004-L130

    2013-2032r, Curtis Hard side cab (project), H130 FEL & 61"bucket, Artillian Modular Grapple on HD frame with Diverter, 2300# Artillian frame w/ 36" x 3" tines, 46BH 9" & 13" bucket, Frontier RB1060, HLA 1000 series 60" JDQA Snow plow, JD ballast box, RK QH, Homemade 3pt multi purpose hitch, 117W of extra LED lights on ROPS and side Brush guards, Ken's bolt on hooks-3x, Ideal Knife grooved R-4's.

  5. The Following User Says Thank You to balrog006 For This Useful Post:

    Maddog (07-04-2017)

  6. Top | #3

    Join Date
    Sep 2015
    Last Online
    03-02-2019 @ 06:20 PM
    Location
    Lehigh Valley PA
    Posts
    3,228
    Thanks
    1
    Thanked 201 Times in 195 Posts
    Quote Originally Posted by Maddog View Post
    My Dodge Ram 1500 has 215,000 miles on the engine. These days is sees very little use, maybe 2,000 miles a year if that. It does burn oil but not too bad. I recently put in a quart of Shell Rotella 15W40 diesel oil & noticed it burns less over 500 miles use. I'm thinking of using 15W40 on my next oil change with also a quart or so of Lucas oil mixed in. I don't think I will do any harm on an engine with 215 K on it. The truck is currently used for lumber & material pick up at the local lumber yard only five miles away & sometimes it make a 30 mile round trip into town. Average monthly use is less than 200 miles a month. It's an eight cylinder engine & I think the original oil spec is for 5W20(?). Thanks for the advice / opinion.

    Yes. It would probably work better.
    Herminator likes this.
    2014 X540 with HDAP tires, 54" deck, brush guard, arm rests and cargo bag.
    JD 48" plow with angle from seat kit & heavy duty skid shoes.
    4 suitcase weights and chains.
    JD tow behind spreader.
    JD 42" lawn sweeper.
    JD 10P cart.
    JD JS61 RWD walk behind mower.
    Stihl KM110 power head with pole saw, shaft extension, power scythe, curved shaft edger, 2 straight shaft cutters (string & blade).
    Stihl MS180-CBE 16" saw.
    Stihl SH86C hand held blower vac.

  7. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

  8. Top | #4

    Join Date
    Oct 2014
    Last Online
    Today @ 07:46 PM
    Location
    Shenandoah Valley of VA
    Posts
    358
    Thanks
    3
    Thanked 61 Times in 44 Posts
    BigJim55, Ray_PA and em14 like this.
    Romans 1:16 "For I am not ashamed of the gospel of Christ..."

  9. The Following 2 Users Say Thank You to hodge For This Useful Post:

    Maddog (07-04-2017), Treefarmer (07-05-2017)

  10. Top | #5
    Plug Ugly's Avatar
    Join Date
    Nov 2016
    Last Online
    Today @ 08:56 PM
    Location
    NE Iowa
    Posts
    544
    Thanks
    13
    Thanked 95 Times in 73 Posts
    Yes.

  11. The Following User Says Thank You to Plug Ugly For This Useful Post:

    Maddog (07-04-2017)

  12. Top | #6
    ErikR's Avatar
    Join Date
    Jan 2015
    Last Online
    Yesterday @ 08:03 PM
    Location
    Northern WI
    Posts
    689
    Thanks
    27
    Thanked 199 Times in 122 Posts
    I've never used Rotella T6 in my cars or trucks, but I've used it in my motorcycles for years. I started using it in an '03 Goldwing, used it in an '06 FJR and still use it in my '09 Zx14. I've used it those bikes since their first oil change. The Zx14 has over 52,000 miles on it and it uses no oil. It's very popular with motorcyclists! The label on the blue bottle says it meets JASO MA specs, same as most motorcycle specific oils, without the clutch slip causing "friction modifiers".

    So, yes, it's safe to use Rotella in a gas engine... A little more $$ than conventional oil but great protection
    2014 1025R, H120 loader w/53" bucket and Heavy Hitch Tooth Bar, 54" Auto Connect MMM, 47" QH snow blower, Ballast box and loaded rear tires, Speeco Quick Hitch, Ken's Bolt-on Grab Hooks, King Kutter Carry All, 54" front QH blade w/Heavy Hitch skids, Titan 36" pallet forks, Land Pride GS0560 Grading Scraper, and chrome (kitchen drain pipe) exhaust tip!!

    1950 Allis-Chalmers B, Electric start, PTO, Belt Pulley, Hydraulic pump. Stuck engine (a work in progress)

  13. The Following User Says Thank You to ErikR For This Useful Post:

    Maddog (07-04-2017)

  14. Top | #7

    Join Date
    Dec 2012
    Last Online
    09-10-2019 @ 11:40 AM
    Location
    Belton, South Carolina
    Posts
    1,646
    Thanks
    499
    Thanked 130 Times in 103 Posts
    Quote Originally Posted by balrog006 View Post
    Given your location and the miles on the engine I wouldn't worry about using that oil- and if it stops consumption/burning all the better.

    You'll not experience any cold starts down south so you won't be working the engine on super thick cold oil and there are lots of folks who subscribe to the notion of going up a thickness grade in a motor to try and stop oil use out there.

    Bottom line, at that mileage in your truck-do as you think is best. I don't think you'll cause any harm.

    Added: original spec was likely 10w or 5w30, I had an '01 with the 5.9l.
    Thanks- That's exactly what I was thinking. Operating temps here in the south are on the warm to hot side. Overnight winter temp could drop as low as 20f, but by 10 a.m. it could reach 40 plus. And the truck is never on the road until late mornings if at all.
    BigJim55 likes this.

  15. Top | #8
    tomd999's Avatar
    Join Date
    Jun 2011
    Last Online
    06-30-2019 @ 10:15 AM
    Location
    Manchvegas, NH area
    Posts
    1,965
    Thanks
    0
    Thanked 422 Times in 285 Posts
    Quote Originally Posted by Maddog View Post
    My Dodge Ram 1500 has 215,000 miles on the engine. These days is sees very little use, maybe 2,000 miles a year if that. It does burn oil but not too bad. I recently put in a quart of Shell Rotella 15W40 diesel oil & noticed it burns less over 500 miles use. I'm thinking of using 15W40 on my next oil change with also a quart or so of Lucas oil mixed in. I don't think I will do any harm on an engine with 215 K on it. The truck is currently used for lumber & material pick up at the local lumber yard only five miles away & sometimes it make a 30 mile round trip into town. Average monthly use is less than 200 miles a month. It's an eight cylinder engine & I think the original oil spec is for 5W20(?). Thanks for the advice / opinion.
    Hey Maddog,

    There is a difference between "burning oil" and "oil consumption". Engines that "use oil", that is, require make up oil to be added between changes may not be "burning oil" in the traditional sense, for example loss of oil control by the rings or the guides resulting in blue smoke out the exhaust, but they be consuming oil because of the oil itself is boiling out it's volatile components and the PVC system is pulling them away to be burnt in the combustion chambers. Different quality/brands of oil have different volatility specs, generally the higher the price, the less it tends to evaporate in use as the less expensive brands include volatile components in order to achieve the lower viscosity rating, as these boil away, the oil thickens and falls out of the listed viscosity range. Synthetics for the most part have almost no volatile components and are considered viscosity stable over the service life of the oil.

    Now I'm not saying that an engine with 225K on it may not be using oil, but before you go putting a 15w-40 in an engine designed for 5-30 or 10w-30 you may want to try a higher quality brand or one of the "high mileage" type oil of the recommended viscosity and see if you get less oil consumption.

    I'm reluctant to recommend a higher viscosity oil to lessen consumption as that can have negative aspects in the engine such as reduced MPG, less splash lubrication of components, less flow for cooling components, slower delivery to components on cold start etc.
    dieselshadow likes this.
    2010 3320 Cab
    Loaded R3's, 300CX w/3rd SCV
    61" HD-Tooth Bar, 72" HD-bolt-on edge, Frontier Forx
    "A" front hitch, Mid-PTO, Air ride seat, Horn, Back-up alarm, Rear work lights, External mirrors, Auto cruise
    60HD broom. 366 Blade, 59 blower, i-Match
    Looking for: Rear Wheel Weight Set

    Stuff for Sale:
    New 200CX/H130 Masts 25/2720-2032R
    New Jamison Bryce adapter, cart and chute

    “Suppose you were an idiot, and suppose you were a member of Congress; but I repeat myself” Mark Twain

  16. The Following User Says Thank You to tomd999 For This Useful Post:

    Maddog (07-05-2017)

  17. Top | #9
    89420's Avatar
    Join Date
    Aug 2015
    Last Online
    08-06-2019 @ 01:00 PM
    Location
    st.louis
    Posts
    568
    Thanks
    21
    Thanked 55 Times in 52 Posts
    yes its far better then any car only rated oil. more zinc,much stronger additive pack ect. look on the back of the bottle should show rated for road tractors (semi's) construction, and cars/pick up truck gas engines.. look on bottle of car oil and its not rated for diesels.. diesel oil is rated for gas and diesel engines

    diesels have way more cylinder pressure and normally a turbo to oil .. a diesel still has pistons,valves,lifters,camshaft,crankshaft,rod,cam bearings ect
    the diesel oil cleans very well and breaks down those particals to tiny microns and suspense them in the oil.. in a real diesel soot is why the oil turns black diesel rated oil takes that soot and breaks it down and keeps it from hurting the engine....

    put car only rated oil in a diesel and the soot may clump up and become harmful in the engine.

    bottom line yes its way better.. you can get rottella in a 10w30 weight if your worried about the 40wt being to thick (its not)
    1935 jd model D
    65 110 rf
    77 jd 80 cart
    83 420 rear pto, 3 point hitch
    88 332 46"deck s
    89 420 60" deck
    89 318
    jd #8 chainsaw (remington)
    2)jd 35ev chainsaws (echo)
    jd 50v chainsaw (echo
    jd 60v chainsaw (echo)
    jd 70v chainsaw (echo) sold
    jd 80ev chainsaw (echo)
    jd cs40 chainsaw (efco 940)
    husqvarna 240 chainsaw
    husqvarna 372xp chainsaw
    husqvarna 455 chainsaw
    2)dolmar 117 chainsaws
    dolmar 100 chainsaw

  18. The Following User Says Thank You to 89420 For This Useful Post:

    Maddog (07-05-2017)

  19. Top | #10
    sennister's Avatar
    Join Date
    Dec 2015
    Last Online
    Today @ 05:55 PM
    Location
    Twin Cities, MN
    Posts
    2,079
    Thanks
    30
    Thanked 224 Times in 185 Posts
    As mentioned there is nothing in Diesel Engine oil that can't be used in a gas engine.

    I also use it (T6) in a lot of motorcycles. They also make a T5 oil which you can get in a weight closer to what your truck calls for like a 10w-30.


    JD Z950R 60" Deck with DFS Collection System

    JD X585, 54C deck,
    CTC Model X4750 F.E.L - Modified Imp Pressure Relief from 900 to 1175PSI, Power Flow and MC519 cart, 54-inch Quick-Hitch Front Blade, 47-inch Quick-Hitch Snow Blower, 3-pt hitch, HF Quick Hitch, Heavy Hitch, 48" box blade/rear blade, Dethacher, 3pt Sprayer

  20. The Following User Says Thank You to sennister For This Useful Post:

    Maddog (07-05-2017)

  21. Remove Advertisements
    GreenTractorTalk.com
    Advertisements
     

Page 1 of 2 1 2 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •