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i would go with dealer in that scenario, hands down. Why not kick it up to 8k klicks/5k miles? That remains very conservative. Stay with factory recommended - 5W20 is important for VVT and MDS ops.
Just to let you know but my dealer recommends synthetic blend 5w20 and won’t put full synthetic in. Also mds and vvt are not disrupted by 5w30 as proven by many many people.
Nothing wrong with the 0W-20, nothing. Too much b.s. hyp from folks saying needs to 5W whatever. Whole lot of useless crap there.
Try Z Max
Multiviscosity motor oils are a blend (recipe) of various chemicals and base oils. The advertised operating temperature range is determined on the balance between Pour Point Depressants (to lower pour point temperature) and Viscosity Index Improvers (to raise viscosity for higher temperatures). Depending on the chemicals used to stretch the oil molecules to obtain the desired temperature range, excessive stretching can cause destabilization as either the VII or the PPD components will expend at different rates, possibly ending up with an oil flow problem when cold, or viscosity loss at engine operating temperatures.
Keep your stock airbox for the winter Dave.Vararams have been known to drift full of snow,if you're driving in a snow storm,or have to park it outside.I had a buddy put one on his truck,during a Chinook,then roar out to my place to show it off.The streets were wet and slushy in Calgary,and by the time he got to my place in Airdrie,he'd picked up enough wet slushy salt infested road crap,the filter had started to collasp,and had a couple big open spots,letting alot of the road crap into the engine.I had to drive him back into the city,and we picked up his original airbox and threw it back on.After that he swapped the Vararam back to the original airbox every winter.If you hunt around on google/youtube,you'll find pictures of them drifted full of snow.They aren't really a winter airbox for up here
I think Filter Wear or Outer Wear have a sock for the Vararam air filter Dave,if they do,i'd invest in one.
filterwears.com
They're worth having in my opinion.Some guys claim they hurt power,but i've done a couple back to back tests at the track ,between having them on and having them off on both the truck and the wifes old Shaker hood 2016 Challenger,and neither vehicle changed et or trap speed.And that was going from a used filter with the sock,to brand new filters with no sock on both vehicles.It's a 155 miles up to Castrol,so anything i take up for racing,makes the drive up on the daily driver filter,and then i swap to brand new filters at the track
