What oil & oil filter do you use?

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All conventional oils, no synthetics.

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For a crankcase, you usually aren't gaining much from synthetics. While the oil itself holds up longer, it will still load up with blow-by crap long before you reach the usable life of the oil itself.

With gearboxes, steering pumps, etc synthetics are usually worth using, since blow-by isn't an issue and thermal loading is.

My trucks get conventional 5w30 and mobil filters usually, fourhweeler gets conventional 10w30. Sometimes I put other stuff in the 4x4 if it's on sale.

I use Valvoline in Everything, specifically MaxLife in my truck.

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Truck has 125K on it

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I have a little less than 70k on mine. Although I've been told that you can go up to 15k on one change with the Mobil 1 Full Synthetic, I couldn't imagine doing it. I try to change mine around 7500k and the oil is really dark. I don't know if the color really has anything to do with it or not, but I'm not chancing it. It's too easy to change.

ETA: I toyed with the idea of using Royal Purple since apparently it's the best, but there is no way in hell I'm paying that much for it.

2011 Highlander and wife's car...

Fram Filters
Pennzoil Platinum Synthetic 0W-20

Going 10,000 between changes...

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Considering purchasing one of these for my wife. Would appreciate your thoughts on the vehicle(pros/cons).
tdjudgesmails@gmail.com

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My mom has a 2009 and it's been a good car. The only problems it's had was loss of A/C on the driver's side and a radio dial that popped in and wouldn't spin. As much as those sucked (especially the A/C in LA summer) they were both replaced under warranty.

For my 2004 GMC Envoy with 125k miles:

7 quarts Royal Purple 5w30
K&N or Mobil 1 EP filter

or

7 quarts Mobil 1 Extended Performance 5w30
K&N or Mobil 1 EP filter

I usually do a seamfoam treatment about 2-3 days before changing my oil to get all of the crap to fall into the oil pan. I treat the upper intake manifold (the smokiest part), the crankcase, and the gas tank. They suggest 1/3 of the can in each spot.

I do about 10-12k miles between oil changes. I use the oil life meter that's already on the car. It may only calculate oil changes according to mileage but that works just fine for me.

I've heard Wix filters are the best. Can anyone elaborate on their experiences with them?

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7 quarts Royal Purple 5w30

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That's an expensive erl change.

The "every 3k miles" thing was invented by jiffy lube.

I know a good bit about what goes on in crankcases. I know nothing about the guts of the filters on the market.

I use mobil filters because they are the heaviest

Whatever you put on there is probably fine.

As long as it meets or exceeds all of the certs listed in your owner's manual it's fine. It's more crucial with diesels using low ash oil.

4.5gal of Rotella
Motorcraft filter