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Read articles →An owner with two Bobcat CT5555 tractors ran engine oil analyses at three different change intervals, 50, 200, and 350 hours, and walks through the actual Blackstone lab numbers side by side, focusing on copper, lead, and tin wear metals. The data challenges Bobcat's 400-hour spec. More of an open question than a conclusion, but the real test numbers make it useful for CT5555 owners weighing their own maintenance intervals.
Posted by the Gaining Ground channel; the presenter identifies as a CT5555 owner sharing personal oil analysis results, not a dealer or industry professional.
The book calls for the first oil change at 400 hours from zero, with no earlier 50 or 100-hour initial change, then every 400 hours after.
The owner thinks so. His 200-hour sample showed copper 73 times the universal average, and even a 350-hour sample after an early 50-hour change still showed very high copper.
Blackstone said the copper was quite high at 350 hours and did not recommend going over 350 hours before the next oil change.
Yes, lead and tin dropped off as expected with the 50-hour initial change, but copper did not drop and stayed unexpectedly high at 350 hours.
