+1 Napa Oil is Valvoline btw. I do mine ever 6 months regardless of miles. Usually way sooner than 3k because I don't even put that many miles in my jeep in a year but I live in such a harsh climate.
What brand oil and oil filter do you prefer?
- Thread starter jeepmanjerry
- Start date
I have used Castroil 10-30 from Walmart and a NAPA filter for 8 years. Tried Fram filters and had leak problems.
Jeeptrash
Member
I’ve run Castrol 10/30 with a wix filter for the life of my LJ. No particular reason just what standard oil I could buy cheap locally. I change when the oil starts to darken, I can also hear a little lifter noise on startup when a change is needed. Usually 3-4K miles.
WIX, Napa or Mopar. Had a bad experience with a Fram fliter failure and I won't touch them ever again. Penzoil ulta premium synthetic 5w-20 for the Durango, Valvoline VR1 20W50 for the Challenger and whatever is on sale for the XJ. It leaks so much oil now it doesn't matter lol.
sgtjdgelinas
TJ Enthusiast
I try to use mopar oil filters. If Fram improved their line it was likely because they became the "Firestone" of the filter world (firestone lost major share of the tire market many many years ago when they produced a bad line). I have used some Fram Toughguard on some of my old 200K beaters but never on my Jeep. I guess I need to cut one apart to see how they are bonding the paper and can now days- It used to be terrible 20 years ago.
Just remember what oil's purpose is- some are 1) transfer heat to cooler locations away from hot spots, 2) to provide protective film over cams and sliding surfaces, 3) to pick up contaminants, suspend them so they are carried to filter, and 4) buffer acids from combustion.
It is #3 that you better think about if you are doing dirt/gravel trails — air filters are not perfect and the silicon grit must be removed- some of which is too fine for the oil filter. Put your money into quality air filters and inspect them- don't blow them out (or be extremely careful), never wash 'em.
It is #4 that raises it's head with all short trips/cold starts.
So change oil frequently if off road or short trips (with no long mile trips between to boil off moisture/poorly burnt fuel),
I waste money on the oil- I only run in summer heat and 1 oil change a year (fall before storage) it gets Royal Purple just because I feel like it. I only put on 2,500 miles a year as a rule unless I am going west to run trails. A Colorado round trip is 3000 miles and I sure am not going to do an oil change en route so I feel better about the synthetic for high heat breakdown and make sure the air filter is a quality one.
In the old days there was a big gap between oil additives used by oil blenders but the API specs and technologies have improved greatly and since the 4L we run is NOT a stressful application compared to most other engines today- I really think like most posters we could run anything of the correct viscosity. So oil contamination from air or short run cycles is likely our only real concern.
Just remember what oil's purpose is- some are 1) transfer heat to cooler locations away from hot spots, 2) to provide protective film over cams and sliding surfaces, 3) to pick up contaminants, suspend them so they are carried to filter, and 4) buffer acids from combustion.
It is #3 that you better think about if you are doing dirt/gravel trails — air filters are not perfect and the silicon grit must be removed- some of which is too fine for the oil filter. Put your money into quality air filters and inspect them- don't blow them out (or be extremely careful), never wash 'em.
It is #4 that raises it's head with all short trips/cold starts.
So change oil frequently if off road or short trips (with no long mile trips between to boil off moisture/poorly burnt fuel),
I waste money on the oil- I only run in summer heat and 1 oil change a year (fall before storage) it gets Royal Purple just because I feel like it. I only put on 2,500 miles a year as a rule unless I am going west to run trails. A Colorado round trip is 3000 miles and I sure am not going to do an oil change en route so I feel better about the synthetic for high heat breakdown and make sure the air filter is a quality one.
In the old days there was a big gap between oil additives used by oil blenders but the API specs and technologies have improved greatly and since the 4L we run is NOT a stressful application compared to most other engines today- I really think like most posters we could run anything of the correct viscosity. So oil contamination from air or short run cycles is likely our only real concern.
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jeepXcore
TJ Enthusiast
10w30 Castrol GTX High-Milage Synthetic and a no-name oil filter from Pep Boys, every 5,000 miles.
I use Castrol 10w30 GTX High-Mileage Synthetic too. I'm about 50/50 between NAPA Gold and MOPAR filters. Every time I go into the dealership I complain 
to the guys in the Parts Dept. that I can NEVER get the "MOPAR" logo to face up when I screw it on. You should be able to read it when you open the hood ... right? They always say they'll "get right on it" ... but nothing ever happens. :roflmao:
to the guys in the Parts Dept. that I can NEVER get the "MOPAR" logo to face up when I screw it on. You should be able to read it when you open the hood ... right? They always say they'll "get right on it" ... but nothing ever happens. :roflmao:
Just turn the Jeep over so you can read itI use Castrol 10w30 GTX High-Mileage Synthetic too. I'm about 50/50 between NAPA Gold and MOPAR filters. Every time I go into the dealership I complain
TJ2
TJ Expert
Kiwi, just curious if they have Mopar suppliers in your country?
Japan / Singapore / Malaysia is limited in the days.
Japan / Singapore / Malaysia is limited in the days.
OP
Got the Wix oil filter. Went with 10/30 conventional oil.
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Generally I use whatever 5w30 synthetic is on sale but usually that's Castrol from Costco. For a filter I usually go K&N or. Mobile 1, this time I'm going with a Baldwin filter. I also add in a bottle of ZDDP and change the oil regularly once a year whether it needs it or not.
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There must have been a time
when we could have said no.
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There must have been a time
when we could have said no.