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oil change frequency
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  1. Medium Duty Trucks
    '06 C5500 motorhome chassis with the 6.6 LLY. Manual states 10,000 mile oil change intervals or whenever the light comes on, but also makes no mention of conventional v synthetic oil. The engine in this rig has the deep pan, 14.6qt capacity. So far I've been changing between 5-7k with Rotella...
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