609albert Posted January 27, 2014 Share Posted January 27, 2014 I have a 54 mack with the 707 gas engine,I was told to use 15w40 motor oil ,should I use a detergent or non detergent type oil ? Quote Link to comment Share on other sites More sharing options...
scooter Posted February 23, 2014 Share Posted February 23, 2014 detergent, delo 400 or delo 1300 le, rotella. Use a good diesel oil, all the new automotive oils dont have additives to protectFlat tappit cams Quote Link to comment Share on other sites More sharing options...
j hancock Posted February 23, 2014 Share Posted February 23, 2014 Do you know the history of the engine from the previous owner?Lots of older engines were run on straight 30 weight non detergent. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted February 24, 2014 Share Posted February 24, 2014 Non-detergent oils allow the crap in the oil to settle out. This is normally used in engines with no filter.Detergent oils keep the crap in suspension, so it will travel to the filter and be filtered out.For what it's worth...As a general rule, however:(1) Some is better than none, and...(2) Clean is better than dirty. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
fxfymn Posted March 2, 2014 Share Posted March 2, 2014 Use modern 15w-40 oil such as Delo or Rotella. Detergent oils will keep the dirt in suspension, even if you don't have an effective filter it will keep the engine in better shape by allowing you to drain the contaminants with the oil. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment Share on other sites More sharing options...
ws721 Posted March 2, 2014 Share Posted March 2, 2014 For whats it's worth I run 30 wt non detergent in my older engines. An engine that old you don't want to be stirring up anything that has been in there 40 + yrs Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
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