pdl Posted October 2, 2014 Share Posted October 2, 2014 I have three older RD's with E-7, 275's and 300 engines. All are mainly used for winter plowing duties, none very severe. Each truck generally only puts on about 700 to 800 miles per year, and 70-90 engine hours if that. I always struggle with what oil change frequency I should try to follow. All trucks are heated garage kept during the winter months. Any ideas welcome. Quote Link to comment Share on other sites More sharing options...
Glensts Posted October 3, 2014 Share Posted October 3, 2014 I have 4 macks which get between 100 to 200 hours a year. I do oil change, fuel filters,water filter and other maintenance once a year.I do tranny and diff oils every 3 years.Oil is cheap as long as everything keeps running.My trucks are in a cold storage shed during winter but we don't put a lot of hours on in the winter Quote Link to comment Share on other sites More sharing options...
farmer52 Posted October 3, 2014 Share Posted October 3, 2014 Take used oil samples and have them analyzed. Check for contaminants - water and fuel in addition to wear metals, viscosity, and TBN/TAN. I do not change my "low use" vehicles every year. 1 Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
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