Re: car oil and filter
Another strike against Fram from me...
I used to run em, but came across a bad batch one time about a dozen years ago where the spin-on threads were bad. It would spin on real easy and then tighten up...felt like the gasket was touching, but it was incomplete threading. As soon as I fired up the fresh-rebuilt engine, all the oil came shooting out and onto my shop floor. Tried the other two filters I bought that day and they were the same. Threads not cut all the way in so the gasket could seat. I wrote to em and they did good by sending me a healthy envelope of coupons for more filters but I never used em. Been running Purolator and Motorcraft filters ever since...with the occasional Walmart cheapie every so often. And most of all, I check that the gasket is seated every time.
I will use Fram air filters though...hasn't been an problems with them for me.
Oil...I grew up with everything on the farm running Quaker State, but most of my vehicles now run Cenex/HarvestStates Superlube 518 high-detergent ("diesel") oil now. That along with 2000-3000 mile oil changes keeps my engines nice and clean inside.
Everybody will have their personal favorites...and most of the time there won't be any difference between one brand or another. As others have mentioned, the big thing is keep a regular maintenance schedule.
To nightvision's question on the Frontier. I'm guessing you've got a V6 in your Fronty, so this really isn't as crucial as if you'd have a 4-cyl. But if you've got a KA24E four-banger, use nothing except the factory Nissan oil filter. It's the only one that has a good anti-drainback valve to keep some oil near the hydraulic timing chain adjuster. That chain will rattle like hell until the oil makes a circuit through the motor to pump up the tensioner. Really hard on the chain, guides, and where the chain slaps the timing cover. If ya let it go too long, it will chew through the timing cover into one of the coolant passages! I've had two D21 trucks and learned this the hard way on the first. The V6s are timing belt engines and don't have this problem.