Ok here is my take:
I doubt your Ram is getting to proper operating temp very often. This can create a lot of condensation that doesn't get burned off. Among other problems it creates acid in the crankcase that helps break down components and shorten the life of the oil and the engine. As good an idea as starting a vehicle sounds unless you are going for extended periods without starting the truck, you may be doing more harm than good. If you are using your Ram on weekends that is fine. Starting during the week won't help lubrication and will create more condensation.
I would recommend a full synthetic oil since it resists breaking down and sludging better than dino oil. Your engine likely calls for 10w-30 oil and I would recommend you switch to 0w-30. You don't need it from a temperature basis but the oil is thinner at ambient temperature than a 10w oil will be so it will more easily flow at start up,. The oil will have the same protection at temperature as the 10w-30. I don't believe 0w-30 is available as a conventional oil.
I don't recommend blends of any kind since I don't see the purpose other than marketing; in other words they are cheaper than full synthetic but try to claim some the same benefits. What I see is they still have the downsides of conventional oil; mixing them with synthetic doesn't change that.
Originally Posted by redneck
and just to clarify..... running a full synthetic DOES NOT extend oil change intervals!!!!!! remember, the oil filter has not changed in technology in almost 30 years! i run QS syn blend and still change mine every 3000! run more miles at your own risk!!!
I'll respectfully disagree here; synthetics certainly can extend oil drain intervals easily managing 25,000 miles for extended drain brands; the oil does not break down the way conventional oil does. I agree that oil filters are the weak link but 3000 mile oil changes are not necessary these days; even the service manual doesn't make that recommendation. Interim filter changes may be needed with extended drain oil though but not at 3,000 miles.
The truth is you are going to spend more per mile on oil maintenance than someone who drives their truck normally. A full synthetic will allow you to choose an oil that has superior flow at start up and will resist breakdown. Change the oil and filter every 6 months and you should be fine.