The data is in the Ford owners manual near the back page. For the Triton V-10 2 valve engines Ford usually specifies Motorcraft semi synthetic 5W-20. For my coach on the F-53 chassis with the Triton 3 valve engine, Ford specifies 5W-30 Motorcraft semi synthetic. I use Mobil 1 full synthetic in the 5W-30 weight.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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