leversole Posted November 24, 2010 Share Posted November 24, 2010 I have the 675 turbo (aprox 1972 vintage)...what grade oil sould I use?Different for winter? summer?Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/16607-enging-oil-reccomendation/ Share on other sites More sharing options...
MACKS Posted November 24, 2010 Share Posted November 24, 2010 I would go with 15-40 year round. Quote Link to comment https://www.bigmacktrucks.com/topic/16607-enging-oil-reccomendation/#findComment-67274 Share on other sites More sharing options...
randyp Posted November 24, 2010 Share Posted November 24, 2010 I have the 675 turbo (aprox 1972 vintage)...what grade oil sould I use?Different for winter? summer?ThanksWell I swear, no wonder you been having a lil shifting trouble, that truck is sposed to have a non-turbo 673 in it, well, just so happens I have one, why dont we just swap engines and get everything like its posed to be? heh heh,,,worth a try anyway,,,randyp Quote Link to comment https://www.bigmacktrucks.com/topic/16607-enging-oil-reccomendation/#findComment-67281 Share on other sites More sharing options...
leversole Posted November 24, 2010 Author Share Posted November 24, 2010 Well I swear, no wonder you been having a lil shifting trouble, that truck is sposed to have a non-turbo 673 in it, well, just so happens I have one, why dont we just swap engines and get everything like its posed to be? heh heh,,,worth a try anyway,,,randypHmmmmmm......If you had just made that suggestion a little sooner! I am soooooooooo used to the turbo whine I dont think I could live without it! Quote Link to comment https://www.bigmacktrucks.com/topic/16607-enging-oil-reccomendation/#findComment-67282 Share on other sites More sharing options...
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