Like others posted: Fresh fuel is best sulfur PPM is set. A cetane level between 45 and 55 is best. (burns cleaner/less knock) I believe 40 is the minimum in the US, Europe has higher standards.
We are in Europe and recently filled our fuel tanks with"premium diesel" only cost a penny a liter more and have had a trouble free year operating what had been a problematic heating system. Thank you for the info on cutane level, it is a bit more complicated than a gas engine.
If you live in the northern part of the US you may find 3 types of diesel at the pump- #1, #2, and blended. Spring through fall we use #2 like the rest of the country and in the cold months we use #1 or a blend of #1 and #2. "Premium diesel" is often another name for #1. It is not a better quality oil but just refined to be thinner. It produces lower MPG and is more expensive.
2016 Sunseeker MBS W
2010 Honda CRV- SMI Stay In Play Duo
Previous-5th wheel, Class C, tent trailer, tent
In Idaho its winter blend or regular. My truck drops a full mile or more to the gallon when we go to winter blend which is a blend of #2 and #1 so there is less BTUs in the fuel. I always add a cetane booster even in the summer if I remember. Keeping the tank full stops condensation and the growth of algae. I change fuel filters once a year its cheap insurance.
Jake my sidekick (yellow Lab)
2006 F350 6.0
2016 Flagstaff 26 FKWS
AF&AM of Idaho
Is there value in using a fuel additive to boost the cetane?
In my experience, in automotive diesels, yes. We (county fleet) saw a notable reduction in turbo and EGR issues when running cetane boosters in our light duty diesel. There is a saturation level so read your dosing information to avoid waste.
We run lubrication additives in our larger diesels and we saw a reduction in injector failures.
2016 Wildwood 32BHDS
2004 F-250 CC 4X4 V10
I have been seeing lately that some stations and truck stops are beginning to sell #2 diesel fuel with up to 20% bio diesel. As others have already stated this can void most warranties. You have to be very careful at the pumps and read the fine print prior to pumping any fuel.