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John Deere 445, was Mobil 1 0w40 a good choice? #5388901 03/29/20 07:48 PM
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zstand Offline OP
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This is a family members tractor that does not get serviced regularly. I am working from home because of the Covid, and am servicing many of my family's mowers and cars with my extra time. I usually run a 10w30 hdeo oil on my personal OPE, but had a jug of the Mobil 0w40 and went with that on this air-cooled tractor. It mows 5 acres about once a week here in Illinois where 70-90° is pretty normal for mowing season.

Was the 0w40 a good choice, or would I have been better off with a 10w30 or 15w40 HDEO like Rotella or Delo?

20200329_193350.jpg

2017 Prius 75k 0w20 PP
2009 Toyota Sienna 145k
1996 K3500 4x4 110k 5w30
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5388921 03/29/20 08:19 PM
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walterjay Offline
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You have chosen well. Have used it for years in my JD garden tractor. It will give you everything needed at every temp.

Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5388922 03/29/20 08:20 PM
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jfairchild327 Offline
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I would think it will be just fine. It will warm up quickly and be at the 40 weight most of the time. That’s a much more modernized engine vs the old ones that always called for straight 30.


2001 F250 7.3 powerstroke
1993 F250 7.3 turbo
1983 F250 6.9 483,000 miles and counting
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5388960 03/29/20 08:59 PM
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blufeb95 Offline
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Euro spec 0w40 is more like a very thick 30 anyways at 12.9CSt at operating temp so it's barely a 40.

Last edited by blufeb95; 03/29/20 08:59 PM.
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5388974 03/29/20 09:24 PM
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samven Offline
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I am sure everything will survive but that said I would have been more comfortable with a 15w40 just for the thicker base. I know these engines are better than the old ones but every air cooled engine including motorcycles I have seen recommend a thicker base and fewer VII's and the cooling on these small lawn tractors is horrible.

Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: jfairchild327] #5388981 03/29/20 09:28 PM
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kschachn Offline
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Originally Posted by jfairchild327
I would think it will be just fine. It will warm up quickly and be at the 40 weight most of the time. That’s a much more modernized engine vs the old ones that always called for straight 30.

What would it be the rest of the time?


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: kschachn] #5388983 03/29/20 09:31 PM
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zstand Offline OP
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Sorry, this is a water-cooler engine. I mistyped that in my original post.


2017 Prius 75k 0w20 PP
2009 Toyota Sienna 145k
1996 K3500 4x4 110k 5w30
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5388987 03/29/20 09:41 PM
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blufeb95 Offline
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[Linked Image]
I think the think 40 will suit you well here in the midwest

Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5389109 03/30/20 06:41 AM
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Oildudeny Offline
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Since you already had the oil I see no harm using it..

Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: kschachn] #5389113 03/30/20 06:47 AM
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jfairchild327 Offline
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Meaning the engine will be at operating temp and everything expanded. Might have higher consumption when cold till the tolerances tighten up a little


2001 F250 7.3 powerstroke
1993 F250 7.3 turbo
1983 F250 6.9 483,000 miles and counting
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: zstand] #5389137 03/30/20 07:14 AM
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mrsilv04 Offline
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I have two of these tractors... one was purchased brand new, that has 3300 hours on the clock now.

I'd never use 0w-40 in them. HDEO only.

But whatever. It's not your equipment, and the oil is already in there. So... why not.

Hopefully the plastic cam gear that fails has already been replaced. Personally, I wouldn't be messing around with what oil goes in if it hasn't, but it's already in there.


2004 Silverado - on its 3rd Jasper engine in less than one year.
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: jfairchild327] #5389139 03/30/20 07:17 AM
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kschachn Offline
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Originally Posted by jfairchild327
Meaning the engine will be at operating temp and everything expanded. Might have higher consumption when cold till the tolerances tighten up a little

The oil is much, much thicker when cold than when hot. Consumption is at temperature, not when cold (for any oil not just this one). The winter rating will have no effect on consumption at all.


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: kschachn] #5389147 03/30/20 07:27 AM
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jfairchild327 Offline
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But then why do some of my old mowers smoke blue when cold and not at all when warm?


2001 F250 7.3 powerstroke
1993 F250 7.3 turbo
1983 F250 6.9 483,000 miles and counting
Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: jfairchild327] #5389162 03/30/20 07:35 AM
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4WD Online Confused
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“Side winder” pistons can do that … oil leaks past rings during cool down and over time.
For example … I have a low hour well maintained 4 cylinder outboard motor.
If I leave it tilted down … going to smoke at startup and quit every time …
If I leave it tilted up … does not smoke at startup at all.

If a V or vertical cylinder does that … probably valve stem leak.

Re: John Deere 445, was Mobil 1 0w40 a good choice? [Re: jfairchild327] #5389164 03/30/20 07:37 AM
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kschachn Offline
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Originally Posted by jfairchild327
But then why do some of my old mowers smoke blue when cold and not at all when warm?

Well you have worn components or leaking seals that even thick oil can leak through. Here is the oil in question, see how thick it gets when cold? Misunderstanding of the winter rating is not unusual with people thinking things like "it's a 0 grade when cold" or something similar. It's still a 40-grade oil all day long and like every other oil, very thick when cold. No oil gets thin when cold.

[Linked Image]


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
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