15W40 in an old engine?

Posted by Rod in Smiths Falls, ON, on September 25, 2005 at 15:59:10 from (209.71.222.51):

I just bought a Massey Harris 30 with a recently rebuilt engine. The owner has kept 15W40 in it for the six years since he bought it, though the tractor has only been used for a few hours a year by the owner's wife to rake hay.

He claims it will blow a quart of oil from the back seal in about 8 hours of running, though it doesn't appear to burn any. Pressure starts at between 20 and 25 and by the end of the day is down to around 8, the wife tells me.

Should I replace the oil with regular 30 for summer and 10 in winter?

Follow Ups:

• Re: 15W40 in an old engine? buickanddeere 00:39:23 09/26/05 (3)
  • Re: 15W40 in an old engine? Rod in Smiths Falls, ON, 06:18:05 09/26/05 (2)
    • Re: 15W40 in an old engine? buickanddeere 10:41:39 09/26/05 (1)
      • Re: 15W40 in an old engine? Rod in Smiths Falls, ON, 05:37:33 09/27/05 (0)
• Re: 15W40 in an old engine? txgrn 17:56:39 09/25/05 (1)
  • Re: 15W40 in an old engine? Bob 19:16:20 09/25/05 (0)
• Re: 15W40 in an old engine? Rlach 17:42:12 09/25/05 (1)
  • Re: 15W40 in an old engine? Rod in Smiths Falls, ON, 19:48:09 09/25/05 (0)
• Re: 15W40 in an old engine? J. Schwiebert 17:31:21 09/25/05 (1)
  • Re: 15W40 in an old engine? paul 18:49:45 09/25/05 (0)

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