Which weight oil to use in 1972 280SE 4.5?
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Which weight oil to use in 1972 280SE 4.5?
I own a 1972 280SE 4.5. I have been using 20-50 oil in it for some time. It has been suggested that this is too heavy. I do not have the manul so am not sure of the correct weight. Can anyone help? benmerrillpdx@gmail.com. Thank you!
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