Which oil and oil filter do you use and how many miles have you achieved?

[TheBoogieman]

Sucks on the unemployment Boog!!!!!!

I guess Jeep funds and the next alimony checks are both on hold for now....

Luckily, I stashed away $10,000 for a situation like this and didn't tell my wife. I'm looking at it as a month long vacation, after working 7 days a week for all those years. Hopefully I'll find something in the next month. I'll live in my Jeep before I sell this one. Oops, no room in it for the wife. Oh well...............NEXT (wife not Jeep).

 

[jrcotner]

Here's the answer ro your question:

https://www.blackstone-labs.com/
And you'll never wonder again.

 

[Jerry Bransford]

X2 to Boogie saying there's no best oil and filter to use, I use nothing more exotic than a 10W-30 High Mileage conventional motor oil. Use whatever you want and just change both at appropriate intervals and your engine will last a long time. In fact in the nearly 60 years I have been driving, that is the engine oil I have been using 99.9% of the time and I have never had an engine failure or even a serious engine problem. Could I have improved on that with an expensive synthetic engine oil and high-dollar oil filter?? I don't see how.

 

[JoseA]

X2 to Boogie saying there's no best oil and filter to use, I use nothing more exotic than a 10W-30 High Mileage conventional motor oil. Use whatever you want and just change both at appropriate intervals and your engine will last a long time. In fact in the nearly 60 years I have been driving, that is the engine oil I have been using 99.9% of the time and I have never had an engine failure or even a serious engine problem. Could I have improved on that with an expensive synthetic engine oil and high-dollar oil filter?? I don't see how.

How often do you replace it?

 

[Jerry Bransford]

How often do you replace it?

My change interval is every 5k miles unless I've been in really dusty dirty conditions. If that's the case I change it after I get home.

 

[BlueC]

A little bit of this now and then will keep your system cleaned out. IDK what filter to use with it....

 

[trojandawg]

So is the conventional oil actually "better" for the 4.0 than blend or synthetic? Or is either fine?

What oil filter do y'all recommend? I use Motorcraft on my F150 and Mobil1 on my wife's CRV.

I think I'll go with a 3500 mile interval. I know it's probably overkill but it's cheap insurance.

And good hunting @TheBoogieman!

 

[BlueC]

So is the conventional oil actually "better" for the 4.0 than blend or synthetic? Or is either fine?

What oil filter do y'all recommend? I use Motorcraft on my F150 and Mobil1 on my wife's CRV.

I think I'll go with a 3500 mile interval. I know it's probably overkill but it's cheap insurance.

And good hunting @TheBoogieman!

You're soliciting opinions. Get your gloves on and mouthpiece in, here come a fight.

I use WIX filters and Valvoline oils across-the-board. I run synthetic in all modern (OBDII) vehicles, and classics get VR1 (conventional or synthetic, yes I run synthetic in cars from the '50s and '60s with zero issue) for zddp content. My Jeep is on a 2500 mile/2 year oil change schedule because it takes that long to log 2500 miles on my Jeep, but it does a significant amount of that time at low speed.

Ultimately, you just need to choose the right viscosity oil of a reputable name brand (no dollar store/ gas station brands) and use a decent filter, I like WIX. Change at regular intervals as listed in your factory service schedule.

 

[Chris]

Change your oil and filter when you're supposed to and all will be fine. There's no magical oil and filter.

This is the answer.

There is no magical oil and oil filter. Routine maintenance and a good driver is what it's all about.

 

[Jerry Bransford]

So is the conventional oil actually "better" for the 4.0 than blend or synthetic? Or is either fine?

What oil filter do y'all recommend? I use Motorcraft on my F150 and Mobil1 on my wife's CRV.

I think I'll go with a 3500 mile interval. I know it's probably overkill but it's cheap insurance.

Every 3500 miles is excessive except in really dirty conditions, even your owner's manual suggests every 5k miles. Really. And only the quick lube joints like Jiffy Lube started the every 3k mile interval thing, they simply want people to come to them more often.

I personally like conventional engine oil since it appears less likely to cause the rear main seal to start leaking like can happen with many synthetic engine oils. A previous daily driver BMW I owned had never had anything but synthetic Castrol engine oil and it developed a massive rear main seal leak that BMW shops wanted close to $2k to replace. A conventional High Mileage engine oil stopped the leak in about ten days of driving. And a High Mileage engine oil would never be anything but a good idea in an engine with more than 50-75K miles on it. The additional restorative chemicals in a High Mileage engine oil helps to keep the rear main seal in good condition.

There are no particular brands of major engine oils that work better in all categories, I would personally be just as likely to run Valvoline or Castrol as I would Walmart or NAPA branded engine oils. And, again, I've yet to have a significant engine problem in 55 years of driving by doing that.

 

[Duck Doctor]

I use whatever name brand 10w30 is on sale. Change the oil twice each year, which is about 1,000 mile intervals.

 

[trojandawg]

Good points. I think time will trigger an oil change on mine before mileage.

I haven't bought conventional oil in years. Probably when I had my last CJ7 around ten years ago. It had the AMC 360 (that my Dad and I rebuilt after it spun a cam bearing on the drive home from buying it ). I used conventional oil and a ZDDP additive in it. And I def agree with @Jerry Bransford, I've seen the results of the high mileage oil in our worn-out Toyota Corolla. Makes a huge difference with oil leaks in those old seals.

I'll have to see what our local stores carry in conventional and high mileage...

 

[JoseA]

I put very low miles on mine too. Think once a year is too far in between?

 

[bucky]

Oil changes on my Wranglers is determined by time and never by miles. If I changed even at 3500 mi it would take years before the next change. All my modern vehicles are 5-7k intervals. I expect and get at least 300k on my vehicles. The only oil issue I’ve ever had was with my wife’s 17 Sonata that the oil was disappearing at 60k. We got rid of that quick.

 

[Duck Doctor]

I put very low miles on mine too. Think once a year is too far in between?

To me it makes sense to change the oil twice per year. Spring and fall. Maybe it’s overkill but who knows

 

[CreepinDeth]

Me personally, Im not “speculating” on oil efficiency without a lab test.

Just because person X claims to get 20,000 miles off their filter and oil because the label says so, doesnt mean damage hasnt been happening for the past 10,000 miles. Use , time, temperatures all play a factor and none of that is listed.

Oil is the lifeblood, dont skimp ESPECIALLY if youre on a tight budget, and engine replacement isnt something you can afford. I have always considered Amsoil and Royal purple to be top of the ranks on oil, but theres diminishing gains VS cost.

For filters I like WIX and Purolator based on testing and evidence Ive seen on Bob the Oil Guy site iirc. I try to avoid FRAM personally

 

[trojandawg]

I put very low miles on mine too. Think once a year is too far in between?

I never go more than 6 months on any of my vehicles. Some may say overkill, but again, cheap insurance to me.

 

[CreepinDeth]

Its ashame Costcos Kirkland brand of synthetic isnt offered in 10w30 or thats what I would be using in my Jeep. Since it isnt, I just use Valvoline high mileage in the red container

Kirkland synthetics got all the certs for newer vehicles and I use it in my DD which is a 2021 bought new. I am a believer in a good sythetic and a good filter after seeing testing and filter breakdowns

My 2 classic protouring race cars get Amsoil or Royal Purple simply because they see extreme use