Re: 15W40 in an old engine?

Posted by txgrn on September 25, 2005 at 17:56:39 from (209.151.118.63):

In Reply to: 15W40 in an old engine? posted by Rod in Smiths Falls, ON, on September 25, 2005 at 15:59:10:

I have conflicting opinions as to the correct answer.

Higher viscosity oil would raise oil pressure which could put additional strain on the seal and cause increased loss.

Higher viscosity oil would be molecularly thicker with larger molecules which would tend to resist movement by the seal.

I haven't been able to tell any difference between straight 30 and the 15w-40 in use.

Oil's not that expensive.....try one and if it doesn't work try the other.

On 15w-40 I use it in all my tractors including a '50's TO-20 I gave to my son.

Mark

Follow Ups:

• Re: 15W40 in an old engine? Bob 19:16:20 09/25/05 (0)

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