Originally Posted By: njohnson
Originally Posted By: Pablo
Originally Posted By: jk_636
Best i can figure this may have been a 3+ year 30,000 mile OCI, with Amsoil as the last known fill.
With best conditions in certain engines, some of Amsoil's motor oils are 1 year MAX OR 25K miles MAX. But really we don't really know what or which oil was used here.
Did he have any proof of the Amsoil use? He must have had someone do the oil change for him. Who did the change?
Pablo has a good point. Amsoil's best oils are capable of extended drain intervals in CERTAIN engines. Some engines, because they are prone to fuel dilution or sludge or hard on the oil, SHOULD NOT have long drain intervals. Amsoil also has the SEVERE Service for their oils, which shortens the mileage. Amsoil best oils, not the XL or OE series, say UP to 1 year or 25,000 miles.
I think some people can have trouble with this because they know they are using Amsoil, but, then, they don't keep track of the time or mileage. Before they realize it, the 1 year has become 1 year and two or three months, the 25,000 miles has become 30,000 miles or more.
Our dad is like this, he has a truck he uses for work. He has me do the maintenance on it. The manual calls for 5,000 mile oil changes. Sometimes, he is gone in another state for a few months. When he comes home, I tell him it is time to change the oil. This has happened a couple of times, and he has said, "Didn't you just change the oil?"
And I go, "No, dad, you are up to 8,000 miles now."
I think there are other people like that too. They think they will change their oil at 3,000 miles or 3 months, or 5,000 miles or 6 months, next thing they know they are way past it.
This is my brother, in a nutshell-he runs a lot of highway mileage on his Altima, he blows past the 7500 (non severe) OCI every time. Usually it's 10K plus before he remembers to do it. He's approaching 200K on it now, and it is only now starting to burn any oil, even after the dreaded cat manifold failure! Shows what quality synthetic oil and Ultras (mostly) can do!