If you check around the only recommendation for extending oil change intervals by using synthetics comes from the synthetic oil makers.
What does your owners manual recommend for oil type & change intervals? That's what I'd go by.
If it calls for regular oil changed at 3000-5000 miles then, in my opinion, why spend 30-50% more for the synthetic. If your changing by time rather than miles then that would be a waste of money spending the extra for synthetic if it recommends regular oil.
Do you pump premium fuel instead of whatever the auto manufacturer recommends? Most likely not, due to cost. To me it's the same with the oil.
Just my .02 cents!!
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Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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