Hey guys, new to the forum, but a follower for a while. Question I have, we bought a 2008 Chevrolet Equinox with the 3.4L V6 in 2011. First oil change I switched to 5w30 M1 Synthetic and a M1 oil filter. Shortly after I noticed on cold and luke warm starts there was a noticeable lifter tap (narrowed it to the back of the engine with a scope). It has been that way since. OCI has always been in the 3-4K range with the occasional 4500-5K sprint with M1, Valvoline, or Castrol 5w30 Synthetic with M1, Wix or Purolator Gold filters. As of ~73K it still has the lifter tap. I was wondering if any of you guys were experiencing the same thing. Also wanted opinions on switching to a 10W30. I run Rotella T6 in my Volkswagen Jetta 2.5 with good results and was thinking about Rotella T5 10w30 in the Equinox to see if it would quiet the lifters. Does not get too cold here in Mississippi, but hopefully this year we will be moving to Southern Pennsylvania which is not too terribly cold in the winter. As a note, I do not know what the purchasing dealer used in the vehicle to quiet the engine to sell it.
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