This one is a old one but still, not that many people know about it. Jeeps since the mid-80's like the Wrangler, Cherokee and all current Models use a standard oil filter. In most cases, it will be a Fram size PH16. These are small filters. Shorter then a soup can.
A simple and inexpensive way to get more oil and filtering capacity is to move up to a larger filter. Now you will need one that has the same thread pitch as the old one. Not only that but the seal at the bottom has to be the same size also. The way to check the filter is to get look for a size that will work and compare the oil seal and thread. If you know you know what to look for in a decent filter then take a peak inside too.
One filter that is very easy to get a hold of is the Fram size PH8a. This filter is 1.5x larger then the stock filter. This means it will hold that much more oil and filter that much more. Not to mention PH8a's are used across many different cars so they are usually on sale. 2 for $6 isn't a bad deal.
Part Number PH8A 
Product Type Full-Flow Lube Spin-on
Anti-Drain Valve YES
Product Height 5.14"
Product I.D. 3/4-16 Th'd
Product O.D. 3.8"
Relief Valve Setting PSI 12
Style Code 1
Application Example 1995 Ford Mustang GT V8 5.0Cross-Referance:
AC DELCO PF2
PF2CL
PF32
PFL1A
PFL1ACL
UPF2
X14
ADVANCE AUTO PARTS AA8A
AMSOIL ASF15
BOSCH 0451104001
0451104003
0451104065
0451203005
0986452001
0986452002
3500
72102
72102WS
CANADIAN TIRE 1717042
CAR CARE PARTS OF1
OF8
CARQUEST 85515
B1A
R85515
CASE A17415
A33487
E36534
CATERPILLAR 313658
314361
329060
364464
3I1081
773673
CLARK EQUIPMENT 3981923
899839
899899
CONTINENTAL ENGINES TM27L00312
TM27L03100
DAEWOO A251025
DAF 494133
DAIHATSU 1560087320
1560144010000
DENSO 1501004
DENYO 1150100028
DEUTSCH D539
EVERGARD E1A
FACET AUTOMOTIVE 8
FAIRBANKS-MORSE 9097
FARMLAND FER1A
FEDERATED LF115F
PH8A
FERRARI 45384000
FORD 59W18660
9500462
9613330
B7A6714A
B7A6731A
B7A6731B
B8A6731A
B9AE6714A2
B9AE6714A6
B9AE6714B
B9LE6714A
C1AZ6731A
C1AZ6731AP
C3NN6714A
C4AE6714A
C4AF6714A
CC1AZ6731A
COAE6714A
COAE6714B
COAE6731A
COLE6714A
D8NN6714GA
D9AE6714AA
D9AZ6731A
E2AE6714B1A
E3ZE6714CA
ESE1ZE6714AA
O9AZ6731A
FRAM DG8A
HM8A
PH28032
PH32
PH8
PH8A
TG8A
XG8A
GENERAL MOTORS 25162815
5575840
6438121
7984292
9002514
GOODYEAR 2224501
L8A
HINO 1560A41010
IAPCO A0261005
A0280001
OF115
IHC 285451A1
388227
920203
INGERSOLL-RAND 35303692
35366681
40210
59438820
91677369
92128859
JAPAN FILTER CO. JO205
JIFFY LUBE HL3
HL8A
JL119
JL13
JL1A
L30001
JLG 7021869
JOHN DEERE TY9425
K&N HP3001
KENDALL K1
KNECHT AW1
KNECHT FO371
KNECHT OC4
KNECHT OC61
KNECHT OC67
KOEHRING 8023398
KRALINATOR L22
KUBOTA 1540232091
1540232430
1583132430
7000014689
7000032090
HH15132430
LAZORLITE DT152
DT155
L111201
LEDERER LER1
LER1A
LEE LF1
LF1A
LF1HP
LETOURNEAU WESTINGHOUSE KC5042
LISTER 392528
LPM 00013505015
13504918
LUCAS (ALSO SEE CAV) F414
F4644
F5537
F6203
F678
M.A.N. 00024151017
MACK 485GBS1138
MAHLE/KNECHT OC374
MANITOU 171549
MANITOU 171550
MANN FILTER ML1004
MANN FILTER W7172
MANN & HUMMEL W9308
MANN & HUMMEL W936
MANN & HUMMEL W9401
MANN FILTER W94080
MANN & HUMMEL W94081
MASSEY FERGUSON 1900365M91
MASSEY FERGUSON 4223058M1
MASTER PARTS PH2850
MASTER PARTS PH8A
MAZDA ZZL014302
MOBIL MO1A
MO1ABP
MO257
MOF1
MOBIL 1 M1301
MONROE 39201
MONROE FP100
MOPAR 0FE00148
1719635
1739617
1739618
1851658
1944888
2063991
2205517
2471400
2532744
2555929
2647019
2806201
2951957
E5778M
E5779M
J0927787
J0936406
J0938143
J3153230
J8051330
J8990499
L1007
L138
L324
L72
MOTORCRAFT FL1
FL1A
FL1DP
NAPA 1515
41515
21515
31515
NEW HOLLAND 500462
NEW HOLLAND 508129
NEW HOLLAND 76595295
NIPPON 1150100392
NIPPON 1150100393
NISSAN 1520865001
1520865002
1520865010
OREILLY PROTEC MP 101MP
PENNZOIL HPZ1
PZ1
PORSCHE 90110720301
90110720302
90110720303
90110720305
90110720309
911901107
PUROLATOR BASE L30001
PUROLATOR BASE L30119
PUROLATOR BASE L30341
PUROLATOR MF45700A
PUROLATOR MF45700B
PUROLATOR PC25
PUROLATOR PC34
PUROLATOR PC341
PUROLATOR PER1
PUROLATOR PER1A
PUROLATOR PL30001
PUROLATOR TBO1
QUAKER STATE QS8A
STEYR-DAIMLER-PUCH 21785820
712071142
7121071142
STP S01
S8A
STP1
SUNOCO O1
O1A
S72
SUPERTECH ST8A
TOYOTA 0060290915007
1150100381
1560041010
156007600371
1560120550
1560120560
1560141010
1560144010
156014401083
156017810171
1560196101
UNOCAL 76 PF2
UNOCAL 76 PF2A
VALVOLINE DF1
VALVOLINE VO1
VW GROUP 911901107
VOLVO 835779
WAL-MART WF1
WARNER PH8A
WARNER WPH8A
WHITE 159045S
WHITE 312770467
WHITE 36031200
WHITE 400000407
WILLIAM PENN WP8A
WIX 51515
WIX XP 51515XP
** CJ's and Early YJ's use a 16mm Metric thread for the oil filter. This will be a PH3387a. For those who have a metric filter, try a 3980. Owners should also be able to convert to a standard thread filter.
