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Ford 9N, 2N & 8N Discussion Forum
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Gear oil instead of 30 wt.?

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RM Keith

05-30-2004 14:07:40




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Anybody out there who's used gear oil (60 wt.) instead of 30 wt non-detergent which the book calls for? I need a temporary measure to help me get through the summer and enable my 8N to run a bit smoother until it gets an engine rebuild next winter. It's burning some oil now (blue smoke), but it's running rougher than it might and tending to lunging sounds -- UHHHHH,uh,UUUUU ,uh, UUUUU. A Pep Boys oil additive (mouse milk?) smooths things out for a while -- a friend told me the additive is just a can of heavyweight oil. Which reminded me that one Ford dealer who repairs a lot of 8Ns told me they use 60 wt. gear oil instead of 30 wt. non-detergent. Anybody heard of this? Thanks.

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Steve IA

05-31-2004 03:14:52




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
Since the engine oil is pumped thru the governor, mightn't the heavy oil be screwing up the governor function and causing the lunging? Like the others said. I think you're asking for trouble with 60wt gear oil. Good luck. Steve 8N I69302



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FARMALLSERVICE

05-30-2004 21:30:50




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
60 WT.oil in the engine will be like trying to push gum through a straw, with a real strong oil pump you can probably do it but not for long especially if it gets very chilly in your area, temps in the 40's would make it nearly impossible to pump (thats my opinion, with that said- my opinion and $2.25 would buy the coldest beer anywhere in oklahoma)!!!



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R.M. In AL.

05-30-2004 21:09:21




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
I agree with Bob.I think somthing else may be causing the lunging,like gas problems.If its not smoking really bad I would just maybe add a can of STP to the oil to help the oil pressure if you need it,could even add 2 cans if pressure is a problems but I would not add gear oil until I figured out for sure what is making it run badly.You might take a compression check and report back to us and someone will help and get you through the summer.Only 4 months..R.M. In AL.

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JB

05-30-2004 17:37:31




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
I run thicker stuff than that for over 3 years no problems yet. but it doesnt get that cold here either



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Bruce (VA)

05-30-2004 17:30:44




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
I've also heard that you can put sawdust in the differential to quiet the gears down. There are lots of cheap, quick fixes that usually just end up costing more in the long run. At some point, that 60w gear oil is not going to pump....like when the engine is cold.....and instead of just needing to replace the bearings, you will get to replace the crank as well.



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SteveB(wi)

05-30-2004 17:17:13




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
Straight 50 wt motor oil is usually available at Harley shops but it ain't cheap but I guess neather is gear oil.



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2fordsmike

05-30-2004 16:29:21




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
I've been around these old Fords off and on for 50 years. I have never heard of or read of using "60 wt." in the crankcase. Mike-Iowa



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Bob

05-30-2004 14:29:37




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 Re: Gear oil instead of 30 wt.? in reply to RM Keith, 05-30-2004 14:07:40  
20-50 weight ENGINE oil is readily available. The little oil pump gear is fiber, and I don't know how much "goo" you can expect it to pump without failure!

How do you expect the "mouse milk", or heavy oil to help your "lunging"? The only reason heavy oil may help with how it runs is if it helps prevent spark plug fouling. It sounds to me like you may have other issues affecting power output, perhaps ignition or fuel system problems.

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gahorn

05-31-2004 08:08:56




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 Re: Re: Gear oil instead of 30 wt.? in reply to Bob, 05-30-2004 14:29:37  
Go to your local airport (or oil distributor) and get some aviation SAE 50 wt or 60 wt aircraft engine oil. It comes in both non-detergent (called "mineral oil") and "ashless dispersant" (not really a detergent but commonly thought of that way.) Aircraft radial engines regularly used 60 wt oil, while most modern aircraft piston engines regularly use 50 wt. The airport fixed base operator will likely charge $2.50 - $4 per qt, while the oil distributor will charge about $2.25-$2.50 qt, but will require you to buy a 12 qt case minimum.

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