[AT] ford oil

[Howard Fleming]

I have used both 134 and 90w in my 1948 8N.  To some extent it depends 
on what shape your tractor is in.

In my case, the lift worked much better in cold weather with the 134 
oil, but did tend to leak down faster in hot weather.

When I changed it last year I went back to the 90w oil (bought at the 
tractor supply store).  Under light use I am not sure it makes much 
difference with oil you use.  Under heavy load I would tend to stick 
with the 90w oil, since I am not sure how it would hold up in regards to 
lubing the transmission.  (That's my option, anyway... :o).

Not sure if the pump in my tractor has been rebuilt in the past or not. 
  Considering it had the original wiring harness on it up to 3 years ago 
(decided when I had the tool box out, looked down and saw bare wiring it 
was time to fix it... :o0 ), it would not surprise me if it was the 
original one.  Pictures of the tractor are at www.moosebird.net, if 
anyone cares to look (this is the way it looked when I bought the tractor).

Howard




Chris Britton wrote:
> Considering the scotch yoke piston pump in the ford N series was 
> designed around that heavy weight oil..like a 90wt mineral oil.. I don't 
> see how a thinner oil could be said to be 'better' in a blanket 
> statement like that.
> 
> On the ford N boards i frequent.. some people experience a bit better 
> cold weather response fromt he thinner oil.. but the vast majority with 
> a non rebuilt pump.. or one with some wear like the response of the 
> heavy oil much better.
> 
> Axle seals and tranny input shaft seals that don't leak on 90wt have 
> been known to leak with teh thinner 134d type oil.
> 
> You put whatever you want in your tractor.. I think I'll stick to the 
> weight that was specified as oem...
> 
> Soundguy