canadianVRss Posted March 28, 2012 Report Share Posted March 28, 2012 Rotella 15-40 I work for shell and was intregued by your choice. I went to the warehouse and got a box, pulled out a quart and cracked it. HOLY DETERGENTS batman, the smell is intense! I bet it could strip stink off of sh!t! I couldn't find any 5w-30 rotella though Quote Link to comment Share on other sites More sharing options...
f1ss Posted April 1, 2012 Report Share Posted April 1, 2012 Rotella 15-40 Thats what the previous owner of my truck used, but I swapped it out immediately to M1 5/30. No specific reason I switched, I just thought I would swap oil regardless what the dealership did at the time of sale. I didnt know it had 15/40 until I asked for the previous oil change history. Quote Link to comment Share on other sites More sharing options...
JC03SS Posted April 1, 2012 Report Share Posted April 1, 2012 I used m1 5-30 for 2 years then switched to amsoil 5-30 far better than mobil 1. Gm says 5-30 so I'll stay with that. Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted April 3, 2012 Report Share Posted April 3, 2012 Quote Link to comment Share on other sites More sharing options...
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