I have a 2011 Tundra 4WD with the non flex fuel 5.7 liter and the manual calls for 6 month or 5k oil changes. In 2012 they changed to 10k intervals for the non flex fuel engines. I changed the oil 2x a year until the powertrain warranty was expired as I only put between 6 - 8k per year on the truck. I now plan to do yearly changes with Mobil 1 EP 0W-20. December will mark be the first full year of trying this and I plan to run a UOA through Blackstone just to see what the used oil looks like.

Last edited by VAhuntr; 08/28/17.
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