10w-40 VS 15W-40

frank_f15 · 10-17-2002, 10:36 PM

DECIDED TO POST THIS QUESTION ON THIS FORUM,probably gets the most hits.my manual call for 10w-30 or 10w-40, very hard to find. can find 15w-40 easily. my question is how much difference can this possibly make? i mean 10w vs.15w cna't make that much diff. tractor is garage kept, average winter temp is 15 to 30 deg. with a few days in the single digits. don't want to start a oil war on brands and such just a simple ans. IS THERE THAT MUCH DIFF?

karmakanic · 10-17-2002, 11:17 PM

no

ScottAR · 10-17-2002, 11:37 PM

nope... Been using 15w-40 in the 1050 since day one. My manual lists different oils for different temp ranges. 15w-40 fits right in with mine which is about 5deg-104deg.

jhburke · 10-18-2002, 12:07 AM

I just had a 200 hr done on my Kubota B7500 today. The dealer used 15-40 when he changed the motor oil. It must be good enough for them.

frank_f15 · 10-18-2002, 05:27 PM

thats what i like! short and sweet and to the point. that is what i thought. so today i bought NAPA 15W-40 (made by ashland aka valvoline) and a napa gold filter(made by wix) total cost $13.50. after doing some research decided that the oil and filter was basically the same as the name brands at a more moderate cost+ only 3 mi. from home.agree? disagree?

hwp · 10-18-2002, 08:33 PM

I agree with you Frank. I use store brand 15W-40 diesel in the winter, store brand 20W-50 diesel in the summer and store brand (Fram) filters. Haven't had any problems.

Jeff396 · 10-18-2002, 08:54 PM

I think I remember this coming up before. Someone said that the 10w30 and 10w40 motor oils for diesels were commonly available overseas which is why it's in the manuals for our tractors who are headquartered there. I went ahead and used Rotella 15w40 but stuck with the Kubota filters all around along with super udt. Not too bad until you get to the air filters![img]/w3tcompact/icons/shocked.gif[/img]

Jeff

karmakanic · 10-18-2002, 08:55 PM

Agreed on the oil.

Not so sure on the Wix. Try this experiment. Invest the cost of an OE filter and compare the weight. Use both filters, but buy the heavier in the future.

You'll be fine which ever filter you use, as long as you change it often. But you'll feel better.

[img]/w3tcompact/icons/grin.gif[/img],
Dave

NY_Yankees_Fan · 10-18-2002, 09:05 PM

Ok to use the 15W-40 year round??

Tom

karmakanic · 10-18-2002, 09:38 PM

I'd say yes in New Jersey. No in Alaska. I use 20-50 here in Texas year around.

I personally think as long as you're not having any problems starting on cold winter days, your weight is light enough.

(unless you're running a Corvette or Porsche or something else with .0005 main bearing clearances, then you need the 10 or even 5 weight.)

Dave

10-17-2002, 10:36 PM	#1 (permalink)
frank_f15 Super Member Join Date: Mar 2001 Location: BUFFALO ,NEW YORK AREA Posts: 5,935	10w-40 VS 15W-40 DECIDED TO POST THIS QUESTION ON THIS FORUM,probably gets the most hits.my manual call for 10w-30 or 10w-40, very hard to find. can find 15w-40 easily. my question is how much difference can this possibly make? i mean 10w vs.15w cna't make that much diff. tractor is garage kept, average winter temp is 15 to 30 deg. with a few days in the single digits. don't want to start a oil war on brands and such just a simple ans. IS THERE THAT MUCH DIFF?

10-17-2002, 11:17 PM	#2 (permalink)
karmakanic Join Date: Jun 2002 Location: NE Texas Posts: 232	Re: 10w-40 VS 15W-40 no

10-17-2002, 11:37 PM	#3 (permalink)
ScottAR Veteran Member Join Date: Jul 2002 Location: Greene Co, Arkansas Posts: 1,410	Re: 10w-40 VS 15W-40 nope... Been using 15w-40 in the 1050 since day one. My manual lists different oils for different temp ranges. 15w-40 fits right in with mine which is about 5deg-104deg.

10-18-2002, 12:07 AM	#4 (permalink)
jhburke Join Date: Nov 2001 Location: Vermilion County, IL Posts: 311	Re: 10w-40 VS 15W-40 I just had a 200 hr done on my Kubota B7500 today. The dealer used 15-40 when he changed the motor oil. It must be good enough for them.

10-18-2002, 05:27 PM	#5 (permalink)
frank_f15 Super Member Join Date: Mar 2001 Location: BUFFALO ,NEW YORK AREA Posts: 5,935	Re: 10w-40 VS 15W-40 thats what i like! short and sweet and to the point. that is what i thought. so today i bought NAPA 15W-40 (made by ashland aka valvoline) and a napa gold filter(made by wix) total cost $13.50. after doing some research decided that the oil and filter was basically the same as the name brands at a more moderate cost+ only 3 mi. from home.agree? disagree?

10-18-2002, 08:33 PM	#6 (permalink)
hwp Platinum Member Join Date: Dec 2001 Location: St. Catharines, Ontario, CANADA Posts: 618	Re: 10w-40 VS 15W-40 I agree with you Frank. I use store brand 15W-40 diesel in the winter, store brand 20W-50 diesel in the summer and store brand (Fram) filters. Haven't had any problems.

10-18-2002, 08:54 PM	#7 (permalink)
Jeff396 Join Date: Oct 2001 Location: South Carolina Posts: 1,132	Re: 10w-40 VS 15W-40 I think I remember this coming up before. Someone said that the 10w30 and 10w40 motor oils for diesels were commonly available overseas which is why it's in the manuals for our tractors who are headquartered there. I went ahead and used Rotella 15w40 but stuck with the Kubota filters all around along with super udt. Not too bad until you get to the air filters![img]/w3tcompact/icons/shocked.gif[/img] Jeff

10-18-2002, 08:55 PM	#8 (permalink)
karmakanic Join Date: Jun 2002 Location: NE Texas Posts: 232	Re: 10w-40 VS 15W-40 Agreed on the oil. Not so sure on the Wix. Try this experiment. Invest the cost of an OE filter and compare the weight. Use both filters, but buy the heavier in the future. You'll be fine which ever filter you use, as long as you change it often. But you'll feel better. [img]/w3tcompact/icons/grin.gif[/img], Dave

10-18-2002, 09:05 PM	#9 (permalink)
NY_Yankees_Fan Veteran Member Join Date: Mar 2002 Location: Warren County, NJ (60 miles from NYC) Posts: 1,766	Re: 10w-40 VS 15W-40 Ok to use the 15W-40 year round?? Tom

10-18-2002, 09:38 PM	#10 (permalink)
karmakanic Join Date: Jun 2002 Location: NE Texas Posts: 232	Re: 10w-40 VS 15W-40 I'd say yes in New Jersey. No in Alaska. I use 20-50 here in Texas year around. I personally think as long as you're not having any problems starting on cold winter days, your weight is light enough. (unless you're running a Corvette or Porsche or something else with .0005 main bearing clearances, then you need the 10 or even 5 weight.) Dave

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