eshack93 Posted February 24, 2021 Share Posted February 24, 2021 Just for curiosity sake, what oil are you guys running in older Mack trucks and why? Quote Link to comment https://www.bigmacktrucks.com/topic/66034-what%E2%80%99s-your-engine-oil/ Share on other sites More sharing options...
Rob Posted February 24, 2021 Share Posted February 24, 2021 I run Chevron Delo 400 15W-40 diesel oil in the Mack diesels, and Chevron Delo 400 30W in the Detroit Diesels which are two stroke. Never any problems with either over the years. Mobil Delvac 1300 is another good oil to consider. 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/66034-what%E2%80%99s-your-engine-oil/#findComment-469542 Share on other sites More sharing options...
brettj3876 Posted March 13, 2021 Share Posted March 13, 2021 15-40 Rotella. Change every 15k. Both trucks never use more than half a gallon between changes. Works good for us Quote Link to comment https://www.bigmacktrucks.com/topic/66034-what%E2%80%99s-your-engine-oil/#findComment-470587 Share on other sites More sharing options...
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