engine oil February 07, 2012 01:12AM
What viscosity of oil should a person use in a tractor pulling engine? Not brand names I want to know viscosities and why it makes a difference.
30w
15w-40
20w-50
50w
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Re: engine oil February 07, 2012 01:27AM
I've run straight 40w and straight 50wt. Haven't had problem with either. Pesonally I think i'm going to stay with 40wt. more for the turbo bearings than anything. Make sure its a good racing oil thou. They have alot more wear additves in them. I run 15 40 for part of a season once the bearings look like they had two seasons of wear. Went right back to straight weight racing oil. One other thing if your pump dilutes alot run a 40 or 50 wieght in it also. Hope this helps.
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Re: engine oil February 07, 2012 02:54AM
i used cen-pe-co for years,i also used 3 sets of bearings per year.i started this year using 15-40 and lucas,i changed the oil this year after every pull,2-4 hooks.iv used the same bearings all year and they still look great.
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Re: engine oil February 07, 2012 07:31AM
I've had the same rod and main bearings in my engine for 10+ years. I've always used top notch oil but have not used the same brand for all those years. For a few years I used Brad Penn. Then for several years I used Valvoline 50wt racing oil. A couple years I used Amsoil 50 wt synthetic racing oil. For the last couple years I have been using Lucas 50wt racing synthetic. Since I went to synthetic, I run all year on the same oil. Drain a quart or two periodically after the tractor has sat for a while, top it off with new, and go pulling. With that being said, that's provided you don't have a major occurance like scoring a piston or blowing a headgasket or something like that.
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Re: engine oil February 07, 2012 01:40PM
I just use 15-40 from john deere, I figured if it was good enough for 300,000 doller combine or tractor it was good enough for my pullers, but I always change oil about every six pulls, mostly because of wash, or fuel in the oil. two tractors, 14 years on the bearings between them
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Re: engine oil February 08, 2012 01:46AM
Any one that can run 10+ years on a set of bearings don't makes very few pulls a year and are running stock RPMs. Turn 6000+ RPMs and 30+ hooks a year and see if your bearings last 10+ years. MACK
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Re: engine oil February 08, 2012 04:56AM
PUP: You don't win points championships by NOT going to very many pulls. 2000+ h.p. and several years points champ. Also several years points champ runner-up. Looks like you ARE just a PUP. Maybe when you grow up to be a BIG DOG, you'll have polished yer mechanic skills enough to run two years on the same bearings. Don't let your alligator mouth get your hummingbird a$$ in trouble.

P.S. If you've got a sizeable amount of money you want to part with, just bet me.
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Re: engine oil February 08, 2012 05:36AM
Dang PUP bit of negative nancy the last couple days, did u fall out of the wrong side of the bus this am? Or u just tryin to stir up trouble
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Re: engine oil February 08, 2012 06:06AM
Do you run an alky motor or diesel? Also why would you run a set of bearings that long for anyway, it's not like they r that expensive? Or have you just run the same brand of bearings that long?
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Re: engine oil February 08, 2012 06:19AM
Alky motor. As long as the motor has good oil pressure, and the bearings still have babitt on them, there's no reason to replace them IMHO. Clearanced motors run WAY longer than tight ones do, and harder too. I am running factory installed bearings from the 1970's. Those bearings are far superior to the ones offered today. They had better materials in them. It may not work for anyone else, but it works for me. You know what they say: IF IT ISN'T BROKE, DON'T FIX IT.
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Re: engine oil February 08, 2012 01:19PM
Do you hook about one time a year..
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Re: engine oil February 08, 2012 01:59AM
We sell oil to a GN level Pro Stock, he uses 40w. We also sell to some others in the LtPro class that use 50w. All of the alky powered tractors that we sell to use 50w. There are a few customers in these class's that use 20w50 but most use straight weight oils.

S'no Farmer
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Re: engine oil February 08, 2012 05:01AM
why would you use a straight weight oil instead of a multi-grade? wouldn't you increase wear issues on a cold engine with staight weight?
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Re: engine oil February 08, 2012 08:16AM
Straight weight oils tend to be more durable under high load situations. In a pulling tractor cold starting and cold weather running are not an issue. I have always understood that to be the reason for multi-grade oils. We use 70w oil in our blower engines but we always start them and let them warm up before putting them under load. This gets the oil warm and flowing better, that is what the multi-grade oils do is create better flow when cold. Any engine that is under a long constant load like in a boat usually calls for single grade oil as they hold up better under those conditions.

I'm not an expert on oil but these are some things that I have heard over the the years. My first post was just letting you know what oil pullers are buying from us.

S'no Farmer
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Re: engine oil February 08, 2012 09:36AM
I talked to Blain at Cenpeco a bunch of times over the years. Call him and he can tell you all about every kind of oil. A few years back he said the 20/50s have come a long way and would work in pulling. I run my own mix of straight 40 and 50.
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Re: engine oil February 08, 2012 04:56PM
The parifins used in multi vis oil do not open or activate until around 100 degrees C. So if you are running 20w-50 oil in most pulling aps. your oil temp will never be high enough to make the transition to 50 weight. Therefore you are running on straight 20 weight oil. If the load on your bearing surface is less than the centistoke capibility of whatever 20 weight that you have then you will see no wear. If you overcome the oil film and it gets hot enough on that surfacedue due to friction then the oil can "thicken" and give protection. In my opinion a straight weight oil for pulling is more desirable because the centistoke value is much more consistant based on the fact of our applications limited oil temperature fluctuation. If you are concerned about cold starts then preheat the oil.
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