2011 GMC Terrain, 3.0L V-6 with direct injection and VVT. The vehicle has 29,770 miles total on odometer. The oil in this test is Pennzoil Ultra's SM formula filtered though a Fram xtended guard XG10575. Oil was drained when sample was drawn, refill is Ultra SN. This is oil change number six. First was FF, second through fifth was PP and this is PU SM.
My main reason for the test is to see how well the Ultra held up to the expected fuel dilution of these direct injection engines.
Second reason to spring for the test is to see how healthy Ultra SM was for the Terrain since it isn't Dexos approved. I did see a cut sheet for the SN (5w-30) formula and it is Dexos approved now.
Third reason is to establish a baseline of tests to eventually increase the miles between changes. This test was done 193.5 miles after GM's OLM system reached 0%. Vehicle is 85% or so high speed highway use by my wife. And that means she drives 65MPH on someones tail and then when they finally get into the "slow" lane she passes at 80MPH. I assume GM went conservative with these OLM's since this is the first year of the Dexos spec and since most would agree that todays DI engines are rough on oil. Oil has been changed since new following the OLM, but normally around 10% instead of 0%. Unfortunately (or not) this includes the factory fill. This means i have been changing out the oil between 4,800-5,200 miles. I have never had a situation where i would have reached 5,500 miles before 0% was reached. Anyone out there with a V-6 Equinox or Terrain getting more then 5k based on OLM? I hope this finds its way to the GMC Terrain forums for others to benefit from.
I don't like seeing oil out of spec but i must agree with blackstone, as of now it doesen't seem to be causing high wear.
Comments are welcome.
My main reason for the test is to see how well the Ultra held up to the expected fuel dilution of these direct injection engines.
Second reason to spring for the test is to see how healthy Ultra SM was for the Terrain since it isn't Dexos approved. I did see a cut sheet for the SN (5w-30) formula and it is Dexos approved now.
Third reason is to establish a baseline of tests to eventually increase the miles between changes. This test was done 193.5 miles after GM's OLM system reached 0%. Vehicle is 85% or so high speed highway use by my wife. And that means she drives 65MPH on someones tail and then when they finally get into the "slow" lane she passes at 80MPH. I assume GM went conservative with these OLM's since this is the first year of the Dexos spec and since most would agree that todays DI engines are rough on oil. Oil has been changed since new following the OLM, but normally around 10% instead of 0%. Unfortunately (or not) this includes the factory fill. This means i have been changing out the oil between 4,800-5,200 miles. I have never had a situation where i would have reached 5,500 miles before 0% was reached. Anyone out there with a V-6 Equinox or Terrain getting more then 5k based on OLM? I hope this finds its way to the GMC Terrain forums for others to benefit from.
I don't like seeing oil out of spec but i must agree with blackstone, as of now it doesen't seem to be causing high wear.
Comments are welcome.
