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 https://www.bigmacktrucks.com/topic/37249-oil-change-frequency-for-1996-2001-e-7s/ 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 https://www.bigmacktrucks.com/topic/37249-oil-change-frequency-for-1996-2001-e-7s/#findComment-261908 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 https://www.bigmacktrucks.com/topic/37249-oil-change-frequency-for-1996-2001-e-7s/#findComment-261920 Share on other sites More sharing options...
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