Quote:
Originally Posted by Swepco
Also, for your information, 50 weight engine oil is the same viscosity as 90 weight gear oil
Dick Floryanowich
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Wow never knew that! Thanks for taking the time to answer questions.
hyjack
Not sure if this has been covered, but I have a 345 IH SV engine. What weight oil should I run? The manufacture recommend 30wt. But thats 30-40 years ago

I've been running the 20-50wt Swepco306 oil on my freshly rebuilt engine and I changed the oil at about a 1,000
One more question how long does oil last? meaning I don't drive a lot, so how long before the oil just ages out.
Thanks