I have a 1970 Thunderbird with a 429ci that I inherited off of my grandfather. It's in excellent condition. I would like to know what the original type of oil to use, specifically weight. Is it 10w 30, 10w 40??? I need help. Thanks
I have a 1970 Thunderbird with a 429ci that I inherited off of my grandfather. It's in excellent condition. I would like to know what the original type of oil to use, specifically weight. Is it 10w 30, 10w 40??? I need help. Thanks
I would be using 20w50 but that's just my choice, others may have different ideas
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