James,
I agree, it's no secret why over-the-road truckers get 1M miles out of their engines, while coach owners sometimes have to replace theirs with few miles on the clock.
Following the "30-day or less" storage section of the manual just isn't practical for us; unfortunately this may cause problems for some of our motors now and then. The best I can do is to dump the oil after a season of use and in preparation for storage; thereby, getting rid of the acid laden oil which may attack bearing surfaces. Then, while in storage, I drive the bus at least every 30 days, just long enough to get the oil up to temperature.
David Brady
'02 Blue Bird Wanderlodge LXi,
Series 60 Equipped,
Asheville, NC



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