Okay, I'll admit I haven't been checking the oil on the Regal with the 2.4L Ecotec as often as I should. The Buick has 65K miles, 3K miles/4 months on the current fill of 5W-30 QSUD dexos. For the first two years of my ownership, it's gotten AC Delco dexos oil from the dealer every 6 months/4500 miles, and the oil level never budged during an OCI. When my 4 "free" OCs were used up, I thought I'd try QSUD.
My last oil level check, I think, was in early March (mea culpa). I drew out the dipstick this morning, and it was bone dry. It took 2 qts. of Castrol Magnatec 5W-30 dexos to bring the level up to where it should be. I don't see any oil on the ground, and the engine compartment looks dry as well -- there are no obvious leaks on the block or on the components below.
True, coincidence is not causation . . . but it sure looks that way. Have any of you had a sudden change in oil consumption with QSUD, esp. on an Ecotec engine? This could be the old worry about synthetic cleaning stuff out inside my engine so that leaks occur. But how could that much crud have accumulated with my short OCIs?
Or is it simply that this engine does not "like" QSUD?
My last oil level check, I think, was in early March (mea culpa). I drew out the dipstick this morning, and it was bone dry. It took 2 qts. of Castrol Magnatec 5W-30 dexos to bring the level up to where it should be. I don't see any oil on the ground, and the engine compartment looks dry as well -- there are no obvious leaks on the block or on the components below.
True, coincidence is not causation . . . but it sure looks that way. Have any of you had a sudden change in oil consumption with QSUD, esp. on an Ecotec engine? This could be the old worry about synthetic cleaning stuff out inside my engine so that leaks occur. But how could that much crud have accumulated with my short OCIs?
Or is it simply that this engine does not "like" QSUD?