My uncles truck, 2005 Ram 2500 with the 5.9 common rail Cummins. He has 361k miles on it, very well taken care and still used daily. He usually does long highway miles, I've been changing the oil with Delvac 15W40 and a Baldwin filter every 7k miles. He does tow my cousins 31 Contender often, not sure how much it weighs but I'm sure its heavy. Usually gets towed 30 miles to the Gulf and 30 miles back home. He has to take it to Pompano Beach Florida on Friday, 903 miles one way. He has 4k miles on the oil right now and he asked me if he should change it now being he'll be towing all that weight for a long distance or to wait till 7k. I told him I'd ask on here. Also should we shorten the regular oci to 5-6k instead of 7k? Hes not interested in doing UOA's. Thanks guys.
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