One oil change in 11000 miles?

avan wrote:
Change the wording all you want but one oil change at 11,000 miles with that oil change occurring at 6K is not a problem. And if it was synthetics, you can go quite a bit longer.

Changing wording does nothing to correct a lack of comprehension. The OP stated that the oil had been changed once in the lifetime of the rig. Manufacturers recommend frequent, often annual, changes to remove condensation and degraded oil from the crankcase based on both mileage and TIME metrics. As for buying into the extended interval BS, by all means, go 20- or 30K. I listen to pros. that make a living replacing engines and repairing damage caused by those that believe that oil will last a very long time, doesn't get dirty, doesn't suffer a degrading of the additive package, and doesn't get consumed at a much faster rate as it degrades. They do all of this since they listen to two stakeholders that benefit greatly by encouraging you to believe in extended intervals, that being the OEM and the oil marketing folks. The fact that it doesn't actually work in the real world is of no concern to, and considerable benefit to both. My Ford V-10 cost me about $25 to do an oil change on. It's a quick, easy DIY task. A replacement engine runs well over $10K, installed. Even IF there wasn't a huge body of evidence that extended changes are BS, the amount of time and money spent to do 5K intervals is trivial, compared to the risk of a short lived engine.