I'd say the one with the newest tanks in the ground. Only the State of California regulates Cetene level in diesel fuel. Our powerstrokes do not run well with less than 40. The new 6.4 especially. Ontario gov recent survey found Cetene level varied in Ontario from 36 to 46. I highly reccommend Motorcraft Diesel Performance Additive PM 17 for 6.0 and 7.3 or PM 21 for new 6.4 (DO NOT USE WRONG#). $10 lasts 5 tanks. Amazing results, Ridgehill should have it in stock
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