AgTalk Home
AgTalk Home
Search Forums | Classifieds (50) | Skins | Language
You are logged in as a guest. ( logon | register )

15-40 oil in gas engines
Jump to page : 1
Now viewing page 1 [50 messages per page]
View previous thread :: View next thread
   Forums List -> Machinery TalkMessage format
 
1066ih
Posted 12/1/2010 10:56 (#1463051)
Subject: 15-40 oil in gas engines


eastern south dakota
I've been wondering if I can use 15-40 oil in an old Chevy pu. with a 350 engine in it. I always have that oil on hand for my farm equipment and just this pickup is gas and I put 10-40 in it which I buy just for it. If I need to add a quart I might not have that quart on hand, which is a bothersome little thing.

I know the clearances in the main and rod bearings are the same in gas and diesel engines so what would the difference be?
Top of the page Bottom of the page
IH77
Posted 12/1/2010 11:00 (#1463058 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



I've used 15-40 in my old chevy pickups (78, 93 350's) for years and had no problems.
Top of the page Bottom of the page
Indianajones
Posted 12/1/2010 11:03 (#1463062 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



No problems what so ever.
INDY
Top of the page Bottom of the page
Dave Cen.Ia
Posted 12/1/2010 11:04 (#1463063 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



Nevada, Iowa
I am sure there will be a bunch say that it shouldn't be done but ..... I do. I have an old '75 GMC pu that is the service/fuel truck that I have been running 15w-40 in for 15 years. It doesn't get many miles per year and it leaks more than it burns but it gets the same oil as the tractors. I have a couple of old gas tractors for pto work and an older gas straight truck that gets 15-40 also mostly because it's handier to have one oil on the service truck. No failures yet but proceed at your own risk.
Top of the page Bottom of the page
dondozer
Posted 12/1/2010 12:11 (#1463153 - in reply to #1463051)
Subject: Re: 15-40 oil in gas engines


NW Ohio,near Findlay
I run it in everything except 4 wheeler and motorcycle. Have 200 thousand on Honda van and works and runs like new. Get a new one will do same.
Top of the page Bottom of the page
Virginia Veg.
Posted 12/1/2010 12:11 (#1463154 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



Eastern VA. No such thing as too many Magnums.
Thats all we use in all engines, little gasoline pumps, all the way up to the Semis. Pickups and wife's suburban included. I don't know if you need the 10W part in South Dakota, but the temp only gets down in the +teens occasionally in Virginia.
Top of the page Bottom of the page
nwiafmr
Posted 12/1/2010 12:30 (#1463188 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



I was thinking the labels on diesel oil also include the different classes of oil for spark engines, so I went outside and hunted up three old oil containers......Delvac, Mystic, and Cenex Superlube. One of the labels said....."For use in all gasoline autmotive engines currently in use where SAE 15w-40 that meets API SM, SL or SJ is specified." All had similar labels. I have used diesel oil in all my gasoline engines for more than 50 years with no problem whatsoever.....

I have always thought using diesel oil in a gas engine is actually a higher specified oil than is recommended.

Edited by nwiafmr 12/1/2010 12:32
Top of the page Bottom of the page
qmark
Posted 12/1/2010 12:30 (#1463189 - in reply to #1463051)
Subject: Re: 15-40 oil in gas engines



saskatchewan
Only barrel of oil I own, but do use synthetic in some vehicles.
Top of the page Bottom of the page
shoop
Posted 12/1/2010 12:38 (#1463202 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines


a good mechanic told me they took something out of gas oil and you should not use it in older gas engines. harleys do not use a gas oil but use a diesel oil. its not a 15w-40 but something like a 10w-50
Top of the page Bottom of the page
lylefarm
Posted 12/1/2010 12:52 (#1463218 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



East of Dowagiac Michigan
It worked in my '90 Chevy for a while.........I had run it 16 years-180,000 miles before the transmission quit. My '02 Chevy with a 5.3 has been getting 15/40w since I drained out the break in oil.....130K. My S-10 does okay with 15/40w as well.
Top of the page Bottom of the page
tommyw-5088
Posted 12/1/2010 12:52 (#1463220 - in reply to #1463202)
Subject: RE: 15-40 oil in gas engines


Central Texas
shoop - 12/1/2010 12:38

a good mechanic told me they took something out of gas oil and you should not use it in older gas engines. harleys do not use a gas oil but use a diesel oil. its not a 15w-40 but something like a 10w-50


It is the zinc addative for wear ,it is "said " to plug cat converters .

Gas engine conventional oil these days is garbage .

Diesel oil is better , but it has alot of the zinc removed from it too now ,because of the DPF's on 07 and newer diesels .

I use mobil 1 in little honda car , everything else gets 15w40 diesel oil.

If you want some good oil ,get mobil 1 0w50 racing oil .

Edited by tommyw-5088 12/1/2010 12:54
Top of the page Bottom of the page
old-abe
Posted 12/1/2010 13:24 (#1463260 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



NW Oklahoma
We use it in every engine on the place , the ridding mower,4 wheeler, cars, pickups,tractors swathers, etc.
Top of the page Bottom of the page
Wicksfield
Posted 12/1/2010 13:33 (#1463270 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines


NCIN
Okay to use diesel oil in gas engine, just not the other way around. A Shell Engineer told me one time that all oil is good just not to mix them. In a quart of oil, there is only about 1/2 quart of real oil. The rest is additives. Manufactures use different additives that may not mix with other manufacturers additives.

Instead of adding a quart of diesel oil to existing gas oil, I'd drain and refill with all diesel oil.

Top of the page Bottom of the page
JD fanatic
Posted 12/1/2010 13:56 (#1463300 - in reply to #1463051)
Subject: Re: 15-40 oil in gas engines


mw
Cant say that i would feel comfortable starting it when its 6 degrees like it was this morning, or colder, because it will get colder. Also i know your not planning on using it in a new vehicle but certain car manufacturers will void engine related warranties if the correct oil is not used, just something to think about.
Top of the page Bottom of the page
FlyLow
Posted 12/1/2010 14:21 (#1463342 - in reply to #1463051)
Subject: Or, try Lucas?



South Texas

Dear 1066ih,

  I'm not sure if this is appropriate, but besides agreeing with all the posts that 10w-40 is fine, I tried a quart of Lucas engine oil treatment in my '97 Chevy 350 cid pickup with 302,000 miles.  I've run 10w-30 synthetic and when that ran down a quart, I just added the Lucas.  So far, it's added 5 psi to hot idle oil pressure and stopped oil consumption.  I guess for next oil change I'll just go with synthetic and add the Lucas right away.  I'm not advocating for Lucas for everyone, just telling how it went in this instance.

  Hope this helps.  Take care.  Stetts

Top of the page Bottom of the page
Fighting suburbia NC
Posted 12/1/2010 14:27 (#1463351 - in reply to #1463051)
Subject: Re: 15-40 oil in gas engines



Too close to Raleigh, NC
For fuel efficiency (less reciprocating drag on rotating assemblies) newer engines are spec'ed to run 5W-30 or 0W-30. I was surprised to see the oil cap on my Dad's 95 S-10 showing "Use only 5W-30 oil" when I changed it recently. At the increased temps newer engines run for emissions reasons the oil takes a beating from the heat whereas older motors run relatively cool and do not thin out the oil quite as much. Depending on the expected low temps in your area a 0W or 5W might not be out of the question. Here in the mid-Atlantic area we rarely see teens but so 10W-40 or 15W-40 is not an issue.

I believe I read somewhere that new VW motors call for a 0W-20 oil or something. That must have the consistency of cowboy coffee.
Top of the page Bottom of the page
Jon S
Posted 12/1/2010 14:28 (#1463352 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



Tuscarora, MD

Lori's car is the only thing that gets 5w-30 around here. It has just over 150,000 on it now. Everything else gets 15w-40 Rotella or whatever brand around here. I have one gas pickup that has 275,000 miles and has never been down except for O2 sensors and such. When I worked in the fertilizer business, my company truck never used anything but 15w-40. They were still running at over 200,000 when they found a new owner. Of course the pickups I'm speaking of are GM. Wink My F-250 is a pig and is on its third engine with only 80,000 miles but I think that is more of a testament to guys that put the first 60,000 on it.

I can't speak about the Dodge truck because it's a newbie, relatively speaking.

I don't think it matters. Just like ortho and poly phosphate. Laughing

 

 

 

 



 

Top of the page Bottom of the page
Jon Hagen
Posted 12/1/2010 15:16 (#1463424 - in reply to #1463352)
Subject: Re: 15-40 oil in gas engines



Hagen Brothers farms,Goodrich ND
Diesel oil has more ZDDP in it than the new gas engine oils, so is better for the cam and lifter life of an old flat tappet cam Chevy. I run 15-40 diesel in my tired 250,000 mile 80 GMC. Only thing is the cold weather, cranking and time to get oil pressure is much worse than when I ran Mobil 1 synthetic oil in that pickup. Cold start lubrication is not as good as with thin oil, so let it idle for a bit before driving on that first cold start of the day.
Top of the page Bottom of the page
G. DAY
Posted 12/1/2010 16:13 (#1463487 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines



Fresno, California
Have been running Delo 15-40 in everything from Lawnmore, Cummins 855, and 03 Taho, no problem here of course we only see
32 deg. a few days during the year. Have been using Delo Oil since 1960 never had a problem.

George.
Top of the page Bottom of the page
Rawleigh
Posted 12/1/2010 17:04 (#1463543 - in reply to #1463487)
Subject: Re: 15-40 oil in gas engines



White Stone, Virginia
Remember that 15 is the cold weight. That is what the engine sees on startup. You may get more start up wear if it takes longer for the oil pressure to rise.
Top of the page Bottom of the page
Cole Sibley
Posted 12/1/2010 17:15 (#1463558 - in reply to #1463051)
Subject: Re: 15-40 oil in gas engines



I run 15-40 (diesel) in everything that isn't new (including the 2004 Olds Alero), love it. Except for my little '02 Ranger which called for 0-20 (so I listened, not sure it was necessary), and the 08' Tundra, which also calls for 0-20 and gets it (for now). Hard to believe they can make tolerances so tight as to Need 0-20 for a hard working engine (and my engines work Hard), but welcome to the 21st century I guess. Never had trouble, even in the cold with good heavy 15-40.
Top of the page Bottom of the page
Bern
Posted 12/1/2010 18:56 (#1463702 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines


Mount Vernon, WA
A lot of oil out today is multi-rated for both gas and diesel (e.g. CJ-4/SM). It's generally OK to use diesel spec oil in a gas, but not the other way around, and most certainly not in a post 2007 diesel.
Top of the page Bottom of the page
hfi
Posted 12/1/2010 19:47 (#1463792 - in reply to #1463062)
Subject: Re: 15-40 oil in gas engines



SENE
i put 15-40 in an 04 ford for going on 5 years and it hasn't bothered any at all
Top of the page Bottom of the page
TrentonKY
Posted 12/1/2010 21:42 (#1464015 - in reply to #1463051)
Subject: RE: 15-40 oil in gas engines


Trenton, KY
Up until about five years or so ago we used to keep Case IH 15 W 40 and whatever 10 W 30 oil our fuel supplier carried around. The 15 W 40 for the tractors, trailer trucks, combine. And the 10 W 30 for the pickups. But that was always a hassle, so we started just buying Rotella T 15 W 40 oil in gallon jugs and are now using it in everything. So far, in the GM 5.3L gas engines I cant see any problem with it, but we will maybe have 5 mornings a year in single digit temps each winter. On those days it does take a little longer than I would like to see it to get good oil pressure, but its hard to say "how much" longer it takes than it would with 10 W 30. Its pretty easy, now my wife and I take a date about every three months and go to Sams Club to buy the Rotella T (about 30 gallons at a time), and 30 rolls of blue shop towels since they usually run out about the same time!

Edited by TrentonKY 12/2/2010 07:45
Top of the page Bottom of the page
milofarmer1
Posted 12/1/2010 22:39 (#1464159 - in reply to #1463051)
Subject: Re: 15-40 oil in gas engines



Farwell, TX/Pleasant Hill, NM
My dad used 15 - 40 for years and years in his mail route Rangers. Took 3 of them over 200k with no engine problems. If you can catch those weights on sale for $10-11 per gallon that is about $2.50 a quart. Not bad considering Penzoil is over $3 a quart most places now seems like.
Top of the page Bottom of the page
IHforever
Posted 12/2/2010 18:22 (#1465178 - in reply to #1464159)
Subject: Re: 15-40 oil in gas engines


Davenport, Washington
I also use 15-40w All fleet oil in everything. However last year when I, the wife, and some friends went to Chico Hot Springs Montana last winter the wheather went to 18 below. Boy did the 2001 OlDs van start hard! That little starter on those cars really has some poop! Others cars were needing jumps and plugged in to get going. I was wishing I had the 5-30w oil in it at that time.
The only real reason light oils are in the newer cars (80's and newer) was for gas milage and emissions to meet Government requirements. That's why light oils were also put in stick transmissions, transfer cases and rear ends. I know that I lose about two miles per gallion by not using 5-30w in the OLDS.
Top of the page Bottom of the page
tj_farms
Posted 12/2/2010 20:28 (#1465355 - in reply to #1463058)
Subject: RE: 15-40 oil in gas engines... ME too !!!



Delaware, Ohio
The only problem with 15w-40 is slow starting below freezing temperatures, otherwise my 1989 C2500 with 117,000 mile still runs like new.
Top of the page Bottom of the page
Jump to page : 1
Now viewing page 1 [50 messages per page]
Jump to forum :
Search this forum
Printer friendly version
E-mail a link to this thread

(Delete all cookies set by this site)